/usr/bin/java -Xmx16000000000 -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/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:42:12,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:42:12,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:42:12,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:42:12,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:42:12,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:42:12,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:42:12,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:42:12,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:42:12,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:42:12,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:42:12,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:42:12,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:42:12,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:42:12,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:42:12,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:42:12,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:42:12,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:42:12,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:42:12,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:42:12,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:42:12,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:42:12,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:42:12,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:42:12,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 16:42:12,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:42:12,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:42:12,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:42:12,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:42:12,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:42:12,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:42:12,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:42:12,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:42:12,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:42:12,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:42:12,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:42:12,657 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 [2020-10-15 16:42:12,680 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:42:12,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:42:12,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:42:12,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:42:12,682 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:42:12,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:42:12,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:42:12,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:42:12,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:42:12,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:42:12,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:42:12,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:42:12,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:42:12,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:42:12,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:42:12,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:42:12,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:12,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:42:12,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:42:12,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:42:12,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:42:12,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:42:12,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:42:12,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:42:12,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:42:13,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:42:13,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:42:13,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:42:13,060 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:42:13,060 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:42:13,061 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-15 16:42:13,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75945d3a/67c2a4b426d444639af075239d6a2e3b/FLAG1ef3c9159 [2020-10-15 16:42:13,749 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:42:13,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-15 16:42:13,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75945d3a/67c2a4b426d444639af075239d6a2e3b/FLAG1ef3c9159 [2020-10-15 16:42:13,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75945d3a/67c2a4b426d444639af075239d6a2e3b [2020-10-15 16:42:13,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:42:13,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:42:13,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:13,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:42:13,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:42:13,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:13" (1/1) ... [2020-10-15 16:42:13,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331f810f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:13, skipping insertion in model container [2020-10-15 16:42:13,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:42:13" (1/1) ... [2020-10-15 16:42:13,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:42:14,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:42:14,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:14,583 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:42:14,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:42:14,758 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:42:14,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14 WrapperNode [2020-10-15 16:42:14,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:42:14,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:14,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:42:14,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:42:14,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:42:14,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:42:14,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:42:14,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:42:14,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... [2020-10-15 16:42:14,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:42:14,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:42:14,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:42:14,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:42:14,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:42:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:42:14,902 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:42:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:42:14,902 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:42:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:42:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:42:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:42:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:42:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:42:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:42:14,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:42:14,910 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:42:15,203 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:42:15,204 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:42:15,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:15 BoogieIcfgContainer [2020-10-15 16:42:15,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:42:15,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:42:15,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:42:15,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:42:15,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:42:13" (1/3) ... [2020-10-15 16:42:15,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c9fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:15, skipping insertion in model container [2020-10-15 16:42:15,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:42:14" (2/3) ... [2020-10-15 16:42:15,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c9fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:42:15, skipping insertion in model container [2020-10-15 16:42:15,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:42:15" (3/3) ... [2020-10-15 16:42:15,216 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-15 16:42:15,233 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:42:15,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:42:15,243 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:42:15,244 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:42:15,277 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,278 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,278 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,278 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,279 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,279 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,280 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,280 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,280 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,281 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,281 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,281 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,281 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,282 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,283 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,283 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,283 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,284 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,284 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,284 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,285 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,285 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,285 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,286 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,286 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,286 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,290 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,291 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,291 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,291 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,291 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,298 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,299 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,299 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,300 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:42:15,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:42:15,344 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:42:15,344 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:42:15,344 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:42:15,344 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:42:15,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:42:15,345 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:42:15,345 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:42:15,345 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:42:15,357 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:42:15,359 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:15,361 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:15,362 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 16:42:15,399 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 16:42:15,400 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:42:15,406 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 16:42:15,411 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 16:42:16,486 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-15 16:42:16,702 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 16:42:16,703 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 16:42:16,710 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:42:16,722 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:42:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:42:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:42:16,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:16,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:42:16,733 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 16:42:16,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:16,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661551093] [2020-10-15 16:42:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661551093] [2020-10-15 16:42:17,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:17,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:42:17,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659718321] [2020-10-15 16:42:17,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:42:17,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:42:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:42:17,031 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:42:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,130 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 16:42:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:42:17,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:42:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,149 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:17,149 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 16:42:17,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 16:42:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 16:42:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 16:42:17,212 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 16:42:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,212 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 16:42:17,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:42:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 16:42:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:42:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:42:17,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 16:42:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249160821] [2020-10-15 16:42:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249160821] [2020-10-15 16:42:17,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:17,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:42:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144258407] [2020-10-15 16:42:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:42:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:42:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:42:17,360 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 16:42:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,392 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 16:42:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 16:42:17,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:42:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,394 INFO L225 Difference]: With dead ends: 56 [2020-10-15 16:42:17,394 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:17,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 16:42:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 16:42:17,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 16:42:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,404 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 16:42:17,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:42:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 16:42:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:17,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:42:17,406 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 16:42:17,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597536074] [2020-10-15 16:42:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597536074] [2020-10-15 16:42:17,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:17,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:17,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760147346] [2020-10-15 16:42:17,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:17,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:17,529 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 16:42:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,620 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 16:42:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:17,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,622 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:17,623 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:17,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 16:42:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:17,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 16:42:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,633 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:17,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:17,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:42:17,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 16:42:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146658267] [2020-10-15 16:42:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146658267] [2020-10-15 16:42:17,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:17,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90149264] [2020-10-15 16:42:17,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:17,709 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 16:42:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,783 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:17,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,784 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:17,785 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:17,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 16:42:17,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 16:42:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,792 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 16:42:17,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 16:42:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:42:17,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:42:17,794 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 16:42:17,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714143781] [2020-10-15 16:42:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:17,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714143781] [2020-10-15 16:42:17,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:42:17,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:42:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260246357] [2020-10-15 16:42:17,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:42:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:42:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:42:17,895 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 16:42:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:17,962 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 16:42:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:42:17,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:42:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:17,963 INFO L225 Difference]: With dead ends: 57 [2020-10-15 16:42:17,963 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 16:42:17,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 16:42:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 16:42:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:17,970 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 16:42:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:17,970 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:17,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:42:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:17,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:17,971 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:17,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 16:42:17,972 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:17,972 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 16:42:17,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:17,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882901061] [2020-10-15 16:42:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882901061] [2020-10-15 16:42:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980906011] [2020-10-15 16:42:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:18,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:18,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:18,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:18,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345462233] [2020-10-15 16:42:18,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:18,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:18,186 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 16:42:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:18,287 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 16:42:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:18,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:18,288 INFO L225 Difference]: With dead ends: 48 [2020-10-15 16:42:18,288 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 16:42:18,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 16:42:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 16:42:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 16:42:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 16:42:18,294 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 16:42:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:18,294 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 16:42:18,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 16:42:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:18,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:18,295 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:18,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 16:42:18,507 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 16:42:18,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:18,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141987102] [2020-10-15 16:42:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141987102] [2020-10-15 16:42:18,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234713377] [2020-10-15 16:42:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:18,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:18,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:18,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:18,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:18,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041639520] [2020-10-15 16:42:18,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:18,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:18,662 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 16:42:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:18,738 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 16:42:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:42:18,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:18,740 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:18,740 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 16:42:18,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 16:42:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 16:42:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 16:42:18,752 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 16:42:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:18,753 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 16:42:18,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 16:42:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:18,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:18,754 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:18,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:18,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 16:42:18,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:18,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700893799] [2020-10-15 16:42:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700893799] [2020-10-15 16:42:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008473004] [2020-10-15 16:42:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:19,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:19,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:19,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830393186] [2020-10-15 16:42:19,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:19,121 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 16:42:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:19,254 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 16:42:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:42:19,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:19,255 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:19,256 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 16:42:19,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 16:42:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 16:42:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 16:42:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 16:42:19,270 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 16:42:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:19,271 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 16:42:19,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 16:42:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:19,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:19,275 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:19,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:19,476 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 16:42:19,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:19,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879868673] [2020-10-15 16:42:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879868673] [2020-10-15 16:42:19,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958073148] [2020-10-15 16:42:19,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:19,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:19,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:19,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 16:42:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641141612] [2020-10-15 16:42:19,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 16:42:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 16:42:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:42:19,679 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 16:42:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:19,857 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:19,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 16:42:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:19,860 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:19,860 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:19,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 16:42:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 16:42:19,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 16:42:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:19,879 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 16:42:19,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 16:42:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 16:42:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:42:19,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:19,881 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:20,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,097 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 16:42:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:20,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213506153] [2020-10-15 16:42:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213506153] [2020-10-15 16:42:20,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346011827] [2020-10-15 16:42:20,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:20,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:42:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:20,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 16:42:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026948405] [2020-10-15 16:42:20,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:20,254 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 16:42:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:20,429 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 16:42:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:20,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 16:42:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:20,430 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:20,430 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:20,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 16:42:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 16:42:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 16:42:20,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 16:42:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:20,441 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 16:42:20,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 16:42:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:20,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:20,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:20,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 16:42:20,658 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 16:42:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:20,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193739555] [2020-10-15 16:42:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193739555] [2020-10-15 16:42:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893392869] [2020-10-15 16:42:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:20,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:42:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:20,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:20,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:20,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359945266] [2020-10-15 16:42:20,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:20,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:20,796 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 16:42:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:20,905 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 16:42:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:20,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:20,906 INFO L225 Difference]: With dead ends: 64 [2020-10-15 16:42:20,906 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 16:42:20,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 16:42:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 16:42:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 16:42:20,914 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 16:42:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:20,914 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 16:42:20,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 16:42:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:20,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:20,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:21,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,134 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:21,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 16:42:21,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:21,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318279534] [2020-10-15 16:42:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318279534] [2020-10-15 16:42:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158021998] [2020-10-15 16:42:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:21,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:21,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:21,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:21,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6251218] [2020-10-15 16:42:21,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:21,314 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 16:42:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:21,483 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 16:42:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:21,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:21,484 INFO L225 Difference]: With dead ends: 61 [2020-10-15 16:42:21,484 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:21,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 16:42:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:21,489 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 16:42:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:21,489 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:21,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:21,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:21,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:21,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,700 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 16:42:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:21,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049889144] [2020-10-15 16:42:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049889144] [2020-10-15 16:42:21,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709023047] [2020-10-15 16:42:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:21,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:21,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:21,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:21,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 16:42:21,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021844677] [2020-10-15 16:42:21,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 16:42:21,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 16:42:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 16:42:21,814 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 16:42:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:21,965 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:21,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 16:42:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:21,968 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:21,968 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:21,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 16:42:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 16:42:21,973 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 16:42:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:21,973 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 16:42:21,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 16:42:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 16:42:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:21,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:21,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:22,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:42:22,188 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 16:42:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:22,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072555427] [2020-10-15 16:42:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072555427] [2020-10-15 16:42:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368407689] [2020-10-15 16:42:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:42:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:22,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:22,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292860099] [2020-10-15 16:42:22,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:22,343 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 16:42:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:22,576 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 16:42:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:22,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:22,577 INFO L225 Difference]: With dead ends: 58 [2020-10-15 16:42:22,577 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 16:42:22,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 16:42:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 16:42:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 16:42:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 16:42:22,580 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 16:42:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:22,581 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 16:42:22,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 16:42:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:42:22,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:22,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:22,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,792 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 16:42:22,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:22,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104281659] [2020-10-15 16:42:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104281659] [2020-10-15 16:42:22,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936420604] [2020-10-15 16:42:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:42:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:22,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:22,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:22,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:42:22,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856106936] [2020-10-15 16:42:22,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:22,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:22,920 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 16:42:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:23,085 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 16:42:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:23,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:42:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:23,086 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:23,087 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:23,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 16:42:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:23,091 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 16:42:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:23,091 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:23,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:23,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:23,092 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:23,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:42:23,302 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 16:42:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:23,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576831342] [2020-10-15 16:42:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576831342] [2020-10-15 16:42:23,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886483274] [2020-10-15 16:42:23,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:23,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:23,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:23,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535544240] [2020-10-15 16:42:23,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:23,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:23,447 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 16:42:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:23,640 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 16:42:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:23,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:23,642 INFO L225 Difference]: With dead ends: 54 [2020-10-15 16:42:23,642 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 16:42:23,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 16:42:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 16:42:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 16:42:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 16:42:23,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 16:42:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:23,647 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 16:42:23,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 16:42:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:23,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:23,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:23,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:42:23,858 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 16:42:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:23,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806726377] [2020-10-15 16:42:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806726377] [2020-10-15 16:42:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324644854] [2020-10-15 16:42:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:23,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:23,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985209327] [2020-10-15 16:42:24,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:24,005 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 16:42:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:24,122 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 16:42:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:42:24,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:24,123 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:24,123 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:24,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 16:42:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 16:42:24,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 16:42:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:24,128 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 16:42:24,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 16:42:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:24,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:24,129 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:24,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:42:24,339 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 16:42:24,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:24,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109010924] [2020-10-15 16:42:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109010924] [2020-10-15 16:42:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014499034] [2020-10-15 16:42:24,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:24,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:24,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:24,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:24,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387618465] [2020-10-15 16:42:24,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:24,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:24,495 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 16:42:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:24,637 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 16:42:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:42:24,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:24,638 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:24,639 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:24,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 16:42:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 16:42:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 16:42:24,642 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 16:42:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:24,643 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 16:42:24,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 16:42:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:24,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:24,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:42:24,855 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 16:42:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:24,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764734743] [2020-10-15 16:42:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764734743] [2020-10-15 16:42:24,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491276073] [2020-10-15 16:42:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:24,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:24,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:24,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:24,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036033130] [2020-10-15 16:42:24,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:24,976 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 16:42:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:25,123 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 16:42:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:25,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:25,125 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:25,125 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:25,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 16:42:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 16:42:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 16:42:25,131 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 16:42:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:25,131 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 16:42:25,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 16:42:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:25,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:25,133 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:25,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:25,345 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:25,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 16:42:25,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:25,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510891281] [2020-10-15 16:42:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:25,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510891281] [2020-10-15 16:42:25,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426544207] [2020-10-15 16:42:25,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:25,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:25,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:25,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:25,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:25,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500953881] [2020-10-15 16:42:25,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:25,541 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 16:42:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:25,747 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 16:42:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:25,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:25,748 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:25,748 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:25,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 16:42:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 16:42:25,756 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 16:42:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:25,756 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 16:42:25,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 16:42:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:25,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:25,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:25,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:25,965 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 16:42:25,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:25,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898171031] [2020-10-15 16:42:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898171031] [2020-10-15 16:42:26,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622032232] [2020-10-15 16:42:26,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:26,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 16:42:26,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981022390] [2020-10-15 16:42:26,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:42:26,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:42:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:42:26,081 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 16:42:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:26,276 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:26,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 16:42:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:26,279 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:26,280 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:26,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 16:42:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 16:42:26,287 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 16:42:26,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:26,288 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 16:42:26,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:42:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 16:42:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:42:26,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:26,291 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:26,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:26,492 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 16:42:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:26,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874437251] [2020-10-15 16:42:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874437251] [2020-10-15 16:42:26,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693410370] [2020-10-15 16:42:26,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:26,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:42:26,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:26,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:26,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 16:42:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467217089] [2020-10-15 16:42:26,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:26,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:26,651 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 16:42:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:26,924 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 16:42:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:26,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 16:42:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:26,926 INFO L225 Difference]: With dead ends: 69 [2020-10-15 16:42:26,926 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:26,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 16:42:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 16:42:26,931 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 16:42:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:26,931 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 16:42:26,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 16:42:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:26,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:27,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 16:42:27,134 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 16:42:27,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:27,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241247882] [2020-10-15 16:42:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241247882] [2020-10-15 16:42:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738743980] [2020-10-15 16:42:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:27,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:27,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:27,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:27,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199125606] [2020-10-15 16:42:27,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:27,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:27,328 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 16:42:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:27,473 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 16:42:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:27,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:27,475 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:27,475 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:27,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:42:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 16:42:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:27,479 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:27,479 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:27,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:27,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:27,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:27,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:42:27,690 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 16:42:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:27,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509257917] [2020-10-15 16:42:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509257917] [2020-10-15 16:42:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120703935] [2020-10-15 16:42:27,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:27,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:27,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:27,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:27,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:27,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807651430] [2020-10-15 16:42:27,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:27,839 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:28,047 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 16:42:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:28,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:28,048 INFO L225 Difference]: With dead ends: 71 [2020-10-15 16:42:28,049 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 16:42:28,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 16:42:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 16:42:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:28,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:28,052 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:28,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:28,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:28,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:28,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 16:42:28,261 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 16:42:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711604202] [2020-10-15 16:42:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711604202] [2020-10-15 16:42:28,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283023069] [2020-10-15 16:42:28,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:28,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:42:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:28,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:28,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043630368] [2020-10-15 16:42:28,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:28,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:28,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:28,387 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:28,574 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 16:42:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:28,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:28,575 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:28,575 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:28,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:42:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 16:42:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:28,578 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 16:42:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:28,579 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:28,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:28,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:28,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:28,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:42:28,780 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 16:42:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:28,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641432156] [2020-10-15 16:42:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641432156] [2020-10-15 16:42:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109174346] [2020-10-15 16:42:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:28,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:42:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:28,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:28,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:28,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487465116] [2020-10-15 16:42:28,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:28,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:28,921 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 16:42:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:29,161 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 16:42:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:29,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:29,163 INFO L225 Difference]: With dead ends: 67 [2020-10-15 16:42:29,163 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:29,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 16:42:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:29,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 16:42:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:29,167 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:29,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:29,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:29,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:29,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:42:29,368 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 16:42:29,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:29,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989531393] [2020-10-15 16:42:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989531393] [2020-10-15 16:42:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699100958] [2020-10-15 16:42:29,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:29,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:29,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 16:42:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342297223] [2020-10-15 16:42:29,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:42:29,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:42:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:42:29,483 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 16:42:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:29,724 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:29,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 16:42:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:29,725 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:29,725 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:29,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 16:42:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 16:42:29,729 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 16:42:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:29,729 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 16:42:29,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:42:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 16:42:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:29,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:29,730 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:29,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:29,942 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 16:42:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:29,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702335680] [2020-10-15 16:42:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702335680] [2020-10-15 16:42:30,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297204449] [2020-10-15 16:42:30,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:30,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:30,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:30,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477465667] [2020-10-15 16:42:30,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:30,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:30,081 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 16:42:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:30,369 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 16:42:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:30,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:30,370 INFO L225 Difference]: With dead ends: 62 [2020-10-15 16:42:30,370 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:42:30,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:42:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 16:42:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 16:42:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 16:42:30,373 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 16:42:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:30,374 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 16:42:30,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 16:42:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:42:30,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:30,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:30,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:42:30,576 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 16:42:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931645020] [2020-10-15 16:42:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931645020] [2020-10-15 16:42:30,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441295888] [2020-10-15 16:42:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:30,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:42:30,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:42:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:30,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:30,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:30,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:42:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194478020] [2020-10-15 16:42:30,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:30,710 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 16:42:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:30,996 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 16:42:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:30,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:42:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:30,997 INFO L225 Difference]: With dead ends: 68 [2020-10-15 16:42:30,998 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 16:42:30,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 16:42:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 16:42:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:31,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 16:42:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:31,002 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:31,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:31,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:31,003 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:31,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:42:31,211 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 16:42:31,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:31,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786444128] [2020-10-15 16:42:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786444128] [2020-10-15 16:42:31,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445932118] [2020-10-15 16:42:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:31,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:31,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064599348] [2020-10-15 16:42:31,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:31,363 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 16:42:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:31,653 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 16:42:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:31,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:31,658 INFO L225 Difference]: With dead ends: 60 [2020-10-15 16:42:31,658 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 16:42:31,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 16:42:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 16:42:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 16:42:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 16:42:31,661 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 16:42:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:31,662 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 16:42:31,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 16:42:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:31,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:31,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:31,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:31,863 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:31,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 16:42:31,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:31,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090315066] [2020-10-15 16:42:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090315066] [2020-10-15 16:42:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884062683] [2020-10-15 16:42:31,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:32,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:32,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:32,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:32,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639238870] [2020-10-15 16:42:32,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:32,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:32,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:32,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:32,019 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 16:42:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:32,158 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 16:42:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:42:32,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:32,160 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:32,160 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 16:42:32,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:42:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 16:42:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 16:42:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 16:42:32,165 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 16:42:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:32,165 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 16:42:32,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 16:42:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:32,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:32,166 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:32,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:32,377 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 16:42:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:32,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203605663] [2020-10-15 16:42:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203605663] [2020-10-15 16:42:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634933328] [2020-10-15 16:42:32,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:32,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:32,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:32,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:32,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:32,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:32,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95088923] [2020-10-15 16:42:32,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:32,564 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 16:42:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:32,755 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 16:42:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:42:32,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:32,757 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:32,757 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:32,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:42:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 16:42:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 16:42:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 16:42:32,760 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 16:42:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:32,761 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 16:42:32,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 16:42:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:32,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:32,761 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:32,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 16:42:32,970 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 16:42:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:32,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292322465] [2020-10-15 16:42:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292322465] [2020-10-15 16:42:33,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120686619] [2020-10-15 16:42:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:33,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:33,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469027168] [2020-10-15 16:42:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:33,107 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 16:42:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:33,308 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 16:42:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:33,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:33,310 INFO L225 Difference]: With dead ends: 75 [2020-10-15 16:42:33,310 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:33,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 16:42:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 16:42:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 16:42:33,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 16:42:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:33,318 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 16:42:33,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 16:42:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:33,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:33,318 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:33,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,528 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 16:42:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:33,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541434077] [2020-10-15 16:42:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541434077] [2020-10-15 16:42:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134388933] [2020-10-15 16:42:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:33,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:33,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:33,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:33,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:33,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599980514] [2020-10-15 16:42:33,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:33,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:33,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:33,696 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 16:42:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:33,944 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 16:42:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:33,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:33,945 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:33,945 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:33,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 16:42:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:42:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 16:42:33,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 16:42:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:33,949 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 16:42:33,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 16:42:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:33,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:33,949 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:34,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:42:34,158 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:34,158 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 16:42:34,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:34,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524632276] [2020-10-15 16:42:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524632276] [2020-10-15 16:42:34,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917319518] [2020-10-15 16:42:34,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:34,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:34,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:34,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042931467] [2020-10-15 16:42:34,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:34,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:34,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:34,314 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 16:42:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:34,506 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 16:42:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:34,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:34,508 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:34,508 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:34,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 16:42:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:42:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 16:42:34,512 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 16:42:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:34,512 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 16:42:34,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 16:42:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:34,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:34,513 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:34,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:34,723 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 16:42:34,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:34,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319505756] [2020-10-15 16:42:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319505756] [2020-10-15 16:42:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513217117] [2020-10-15 16:42:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:34,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:34,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:34,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:34,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:34,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:34,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:34,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927518626] [2020-10-15 16:42:34,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:34,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:34,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:34,862 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 16:42:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,173 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 16:42:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:35,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,175 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:35,175 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:42:35,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:42:35,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 16:42:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 16:42:35,178 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 16:42:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,178 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 16:42:35,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 16:42:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:35,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,179 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:35,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:42:35,380 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 16:42:35,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:35,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225381251] [2020-10-15 16:42:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225381251] [2020-10-15 16:42:35,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297594908] [2020-10-15 16:42:35,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:35,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:42:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:35,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:35,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 16:42:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139018141] [2020-10-15 16:42:35,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:42:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:42:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:42:35,510 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 16:42:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:35,794 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 16:42:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:35,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 16:42:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:35,796 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:42:35,796 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:42:35,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:42:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 16:42:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 16:42:35,800 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 16:42:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:35,801 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 16:42:35,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:42:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 16:42:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:42:35,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:35,801 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:42:36,002 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 16:42:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139258726] [2020-10-15 16:42:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139258726] [2020-10-15 16:42:36,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954847362] [2020-10-15 16:42:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:36,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 16:42:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132383664] [2020-10-15 16:42:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:36,165 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 16:42:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:36,520 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 16:42:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:36,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 16:42:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:36,521 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:36,522 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 16:42:36,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 16:42:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 16:42:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:42:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 16:42:36,525 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 16:42:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:36,526 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 16:42:36,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 16:42:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:36,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:36,526 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:36,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 16:42:36,734 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 16:42:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:36,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985420120] [2020-10-15 16:42:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985420120] [2020-10-15 16:42:36,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144351944] [2020-10-15 16:42:36,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:36,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:36,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:36,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750131554] [2020-10-15 16:42:36,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:36,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:36,892 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 16:42:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:37,059 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:42:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:37,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:37,060 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:37,060 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:37,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:42:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 16:42:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:37,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:37,062 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:37,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:37,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:37,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:42:37,264 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 16:42:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485826340] [2020-10-15 16:42:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485826340] [2020-10-15 16:42:37,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511166214] [2020-10-15 16:42:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:37,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:37,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:37,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:37,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:37,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616810401] [2020-10-15 16:42:37,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:37,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:37,447 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:37,719 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 16:42:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:37,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:37,721 INFO L225 Difference]: With dead ends: 81 [2020-10-15 16:42:37,721 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:42:37,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:42:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 16:42:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:37,723 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:37,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:37,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:37,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:37,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:42:37,934 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 16:42:37,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:37,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924881127] [2020-10-15 16:42:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924881127] [2020-10-15 16:42:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139005364] [2020-10-15 16:42:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:38,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:38,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:38,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922871663] [2020-10-15 16:42:38,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:38,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:38,071 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,295 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 16:42:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:38,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,296 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:42:38,296 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:42:38,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:42:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:42:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 16:42:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:38,300 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,300 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:38,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,300 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:38,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 16:42:38,501 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 16:42:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:38,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515229711] [2020-10-15 16:42:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515229711] [2020-10-15 16:42:38,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294227299] [2020-10-15 16:42:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:38,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:38,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:38,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292234125] [2020-10-15 16:42:38,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:38,668 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:38,981 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 16:42:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:38,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:38,984 INFO L225 Difference]: With dead ends: 77 [2020-10-15 16:42:38,984 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:38,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:42:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 16:42:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:38,987 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:38,987 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:38,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:38,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:38,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:42:39,192 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,192 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 16:42:39,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949813457] [2020-10-15 16:42:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949813457] [2020-10-15 16:42:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034289367] [2020-10-15 16:42:39,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:42:39,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:39,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:39,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441416766] [2020-10-15 16:42:39,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:39,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:39,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:39,350 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:39,591 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 16:42:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:39,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:39,592 INFO L225 Difference]: With dead ends: 74 [2020-10-15 16:42:39,593 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:39,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 16:42:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:39,596 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 16:42:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:39,597 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:39,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:39,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:39,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:39,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,806 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 16:42:39,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:39,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341718134] [2020-10-15 16:42:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341718134] [2020-10-15 16:42:39,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446924743] [2020-10-15 16:42:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:39,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:42:39,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:39,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:39,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:39,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:39,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:39,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485613201] [2020-10-15 16:42:39,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:39,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:39,963 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 16:42:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:40,336 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 16:42:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:40,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:40,337 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:42:40,338 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:42:40,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:42:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 16:42:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:40,341 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 16:42:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:40,342 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:40,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:40,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:40,342 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:40,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:42:40,546 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 16:42:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:40,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988394208] [2020-10-15 16:42:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988394208] [2020-10-15 16:42:40,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755398908] [2020-10-15 16:42:40,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:40,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:40,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 16:42:40,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339379799] [2020-10-15 16:42:40,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:42:40,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:40,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:42:40,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:42:40,680 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 16:42:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:40,986 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:42:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:40,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 16:42:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:40,988 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:40,988 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:40,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 16:42:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:42:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 16:42:40,991 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 16:42:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:40,991 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 16:42:40,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:42:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 16:42:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:40,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:41,195 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 16:42:41,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007431249] [2020-10-15 16:42:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007431249] [2020-10-15 16:42:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602702525] [2020-10-15 16:42:41,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:41,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:41,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:41,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:41,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:41,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300024914] [2020-10-15 16:42:41,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:41,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:41,354 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 16:42:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:41,767 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-15 16:42:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:41,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:41,769 INFO L225 Difference]: With dead ends: 70 [2020-10-15 16:42:41,769 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 16:42:41,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 16:42:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-15 16:42:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 16:42:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 16:42:41,773 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 16:42:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:41,773 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 16:42:41,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 16:42:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 16:42:41,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:41,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:41,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:42:41,975 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 16:42:41,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:41,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877475595] [2020-10-15 16:42:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877475595] [2020-10-15 16:42:42,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455509538] [2020-10-15 16:42:42,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:42:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 16:42:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125315573] [2020-10-15 16:42:42,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:42,125 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 16:42:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:42,490 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 16:42:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:42,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 16:42:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:42,491 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:42,491 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 16:42:42,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 16:42:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 16:42:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:42:42,495 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 16:42:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:42,495 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:42:42,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:42:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:42,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:42,496 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,705 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 16:42:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:42,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169556312] [2020-10-15 16:42:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169556312] [2020-10-15 16:42:42,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128973793] [2020-10-15 16:42:42,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:42,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:42,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:42,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:42,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:42,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:42,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:42,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923461627] [2020-10-15 16:42:42,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:42,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:42,901 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 16:42:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,303 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 16:42:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:43,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,304 INFO L225 Difference]: With dead ends: 66 [2020-10-15 16:42:43,305 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 16:42:43,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 16:42:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 16:42:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 16:42:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 16:42:43,307 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 16:42:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,307 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 16:42:43,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 16:42:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:43,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,308 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:43,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 16:42:43,509 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 16:42:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:43,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088651067] [2020-10-15 16:42:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088651067] [2020-10-15 16:42:43,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451368680] [2020-10-15 16:42:43,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:43,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:43,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:43,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:43,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:43,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:43,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628999041] [2020-10-15 16:42:43,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:43,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:43,677 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 16:42:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:43,846 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 16:42:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:42:43,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:43,847 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:42:43,848 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 16:42:43,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:42:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 16:42:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 16:42:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 16:42:43,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 16:42:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:43,852 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 16:42:43,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 16:42:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:43,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:43,853 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:42:44,062 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 16:42:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044488780] [2020-10-15 16:42:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044488780] [2020-10-15 16:42:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832495666] [2020-10-15 16:42:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880981686] [2020-10-15 16:42:44,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:44,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:44,265 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 16:42:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:44,513 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 16:42:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:42:44,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:44,515 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:42:44,515 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 16:42:44,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:42:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 16:42:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 16:42:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 16:42:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 16:42:44,520 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 16:42:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:44,520 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 16:42:44,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 16:42:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:44,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:44,521 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:44,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:42:44,733 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 16:42:44,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:44,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549418352] [2020-10-15 16:42:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549418352] [2020-10-15 16:42:44,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687145341] [2020-10-15 16:42:44,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:44,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:44,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:44,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:44,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499498353] [2020-10-15 16:42:44,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:44,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:44,880 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 16:42:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,110 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 16:42:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:45,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,111 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:45,112 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:45,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 16:42:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:42:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 16:42:45,114 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 16:42:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,114 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 16:42:45,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 16:42:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:45,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,115 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:45,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 16:42:45,324 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 16:42:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:45,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272372332] [2020-10-15 16:42:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272372332] [2020-10-15 16:42:45,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226053027] [2020-10-15 16:42:45,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:45,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:45,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:45,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:45,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531667646] [2020-10-15 16:42:45,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:45,541 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 16:42:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:45,911 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 16:42:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:45,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:45,912 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:45,912 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:45,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 16:42:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:42:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 16:42:45,916 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 16:42:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:45,916 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 16:42:45,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 16:42:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:45,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:45,917 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:46,125 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 16:42:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359499758] [2020-10-15 16:42:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359499758] [2020-10-15 16:42:46,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985118974] [2020-10-15 16:42:46,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:46,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:46,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256902107] [2020-10-15 16:42:46,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:46,336 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 16:42:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:46,641 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 16:42:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:46,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:46,643 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:42:46,643 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:42:46,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:42:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 16:42:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:42:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 16:42:46,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 16:42:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:46,647 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 16:42:46,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 16:42:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:46,648 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:46,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:46,857 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 16:42:46,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:46,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941411145] [2020-10-15 16:42:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941411145] [2020-10-15 16:42:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386966541] [2020-10-15 16:42:46,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:47,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46124478] [2020-10-15 16:42:47,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:47,070 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 16:42:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:47,409 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 16:42:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:47,410 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:47,411 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:42:47,411 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:42:47,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:42:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:42:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 16:42:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:42:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 16:42:47,415 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 16:42:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:47,415 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 16:42:47,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 16:42:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:47,416 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:47,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:42:47,620 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 16:42:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:47,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776942330] [2020-10-15 16:42:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776942330] [2020-10-15 16:42:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553715027] [2020-10-15 16:42:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:47,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:47,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:47,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:47,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:47,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130600142] [2020-10-15 16:42:47,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:47,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:47,810 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 16:42:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,136 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 16:42:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:42:48,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,137 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:42:48,137 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:42:48,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:42:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 16:42:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:42:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 16:42:48,139 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 16:42:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,140 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 16:42:48,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 16:42:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,141 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:48,348 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 16:42:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:48,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332504420] [2020-10-15 16:42:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332504420] [2020-10-15 16:42:48,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067603656] [2020-10-15 16:42:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:48,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:48,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:48,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:48,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905479473] [2020-10-15 16:42:48,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:48,507 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 16:42:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:48,919 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 16:42:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:48,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:48,921 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:48,921 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:48,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 16:42:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:42:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 16:42:48,925 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 16:42:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:48,925 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 16:42:48,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 16:42:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:48,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:48,926 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:42:49,127 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 16:42:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747795737] [2020-10-15 16:42:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747795737] [2020-10-15 16:42:49,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213942547] [2020-10-15 16:42:49,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:49,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 16:42:49,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864088040] [2020-10-15 16:42:49,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:42:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:42:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:42:49,313 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 16:42:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:49,672 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:42:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:49,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 16:42:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:49,673 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:42:49,673 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:42:49,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:42:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:42:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 16:42:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:42:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 16:42:49,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 16:42:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:49,677 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 16:42:49,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:42:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 16:42:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 16:42:49,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:49,677 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:49,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:42:49,878 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 16:42:49,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:49,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145450095] [2020-10-15 16:42:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145450095] [2020-10-15 16:42:49,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535161211] [2020-10-15 16:42:49,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:50,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:50,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 16:42:50,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27842121] [2020-10-15 16:42:50,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:50,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:50,037 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 16:42:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:50,488 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 16:42:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:42:50,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 16:42:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:50,489 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:42:50,489 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:50,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:42:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 16:42:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:42:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 16:42:50,492 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 16:42:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:50,492 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 16:42:50,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 16:42:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:50,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:50,493 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:50,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:42:50,694 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 16:42:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:50,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80003021] [2020-10-15 16:42:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80003021] [2020-10-15 16:42:50,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697469225] [2020-10-15 16:42:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:50,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:50,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:50,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:50,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400347444] [2020-10-15 16:42:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:50,960 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 16:42:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:51,239 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:42:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:42:51,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:51,241 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:42:51,241 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:42:51,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:42:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:42:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 16:42:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:51,245 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:51,245 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:51,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:51,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:51,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:42:51,455 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:51,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 16:42:51,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:51,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448629778] [2020-10-15 16:42:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448629778] [2020-10-15 16:42:51,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311342144] [2020-10-15 16:42:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:51,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:51,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:51,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:51,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147562353] [2020-10-15 16:42:51,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:51,741 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,132 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 16:42:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:42:52,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,134 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:42:52,134 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:42:52,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:42:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:42:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:42:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:52,136 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,137 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:52,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:52,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:52,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:42:52,345 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 16:42:52,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:52,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112628923] [2020-10-15 16:42:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112628923] [2020-10-15 16:42:52,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766767367] [2020-10-15 16:42:52,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:52,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:52,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:52,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:52,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:52,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376292169] [2020-10-15 16:42:52,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:52,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:52,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:52,534 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:52,805 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 16:42:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:42:52,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:52,807 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:42:52,807 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 16:42:52,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:42:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 16:42:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 16:42:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:52,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:52,810 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:52,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:52,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:52,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,020 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,020 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 16:42:53,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437056487] [2020-10-15 16:42:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437056487] [2020-10-15 16:42:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937319824] [2020-10-15 16:42:53,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176879870] [2020-10-15 16:42:53,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:53,220 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:53,592 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 16:42:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:42:53,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:53,594 INFO L225 Difference]: With dead ends: 87 [2020-10-15 16:42:53,594 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:42:53,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:42:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:42:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 16:42:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:53,598 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:53,598 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:53,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:53,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:53,599 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:53,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,807 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:53,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 16:42:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:53,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225806837] [2020-10-15 16:42:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225806837] [2020-10-15 16:42:53,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281155757] [2020-10-15 16:42:53,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:53,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:53,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:53,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:53,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180101662] [2020-10-15 16:42:53,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:53,984 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:54,276 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:42:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:42:54,277 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:54,278 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:54,278 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:42:54,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:42:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:42:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 16:42:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:54,281 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:54,281 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:54,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:54,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:54,281 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:54,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 16:42:54,482 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 16:42:54,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:54,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492830947] [2020-10-15 16:42:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492830947] [2020-10-15 16:42:54,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829956876] [2020-10-15 16:42:54,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:54,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:54,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:54,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:54,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:54,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:54,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:54,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826806705] [2020-10-15 16:42:54,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:54,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:54,675 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,092 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 16:42:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:42:55,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,093 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:42:55,094 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 16:42:55,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:42:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 16:42:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 16:42:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:55,097 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,097 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:55,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:55,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,300 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 16:42:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:55,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954396162] [2020-10-15 16:42:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954396162] [2020-10-15 16:42:55,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783976607] [2020-10-15 16:42:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:55,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 16:42:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:55,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:55,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:55,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992821837] [2020-10-15 16:42:55,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:55,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:55,467 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:55,822 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 16:42:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:42:55,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:55,824 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:42:55,824 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:42:55,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:42:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:42:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 16:42:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:42:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:42:55,826 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 16:42:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:55,827 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:42:55,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:42:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:55,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:55,827 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 16:42:56,031 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 16:42:56,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335997031] [2020-10-15 16:42:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335997031] [2020-10-15 16:42:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476083350] [2020-10-15 16:42:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:56,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:42:56,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:56,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:56,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:56,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:56,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726493279] [2020-10-15 16:42:56,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:56,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:56,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:56,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:56,219 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 16:42:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:56,704 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 16:42:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:42:56,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:56,707 INFO L225 Difference]: With dead ends: 79 [2020-10-15 16:42:56,708 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:42:56,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:42:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:42:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 16:42:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:42:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:42:56,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 16:42:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:56,711 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:42:56,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:42:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:56,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:56,712 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:56,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:56,919 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 16:42:56,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:56,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622449951] [2020-10-15 16:42:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622449951] [2020-10-15 16:42:57,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967637434] [2020-10-15 16:42:57,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 16:42:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 16:42:57,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844895821] [2020-10-15 16:42:57,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:42:57,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:42:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:42:57,065 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 16:42:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:57,459 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:42:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:57,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 16:42:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:57,460 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:42:57,460 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:42:57,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:42:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:42:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 16:42:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:42:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 16:42:57,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 16:42:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:57,464 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 16:42:57,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:42:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 16:42:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:57,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:57,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 16:42:57,672 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 16:42:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:57,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030330989] [2020-10-15 16:42:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030330989] [2020-10-15 16:42:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385203349] [2020-10-15 16:42:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:57,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 16:42:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:57,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:42:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:57,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:57,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:57,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468487543] [2020-10-15 16:42:57,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:57,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:57,836 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 16:42:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:58,371 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 16:42:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:42:58,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:58,373 INFO L225 Difference]: With dead ends: 76 [2020-10-15 16:42:58,373 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 16:42:58,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:42:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 16:42:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 16:42:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 16:42:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 16:42:58,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 16:42:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:58,376 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 16:42:58,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 16:42:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 16:42:58,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:58,376 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:58,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:58,577 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:58,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 16:42:58,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:58,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143329318] [2020-10-15 16:42:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143329318] [2020-10-15 16:42:58,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404592809] [2020-10-15 16:42:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 16:42:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:58,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:58,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:58,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 16:42:58,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301797268] [2020-10-15 16:42:58,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:42:58,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:42:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:42:58,751 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 16:42:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:42:59,256 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 16:42:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:42:59,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 16:42:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:42:59,257 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:42:59,258 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:42:59,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:42:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:42:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 16:42:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:42:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:42:59,261 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 16:42:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:42:59,261 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:42:59,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:42:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:42:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:42:59,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:42:59,262 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:42:59,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 16:42:59,465 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:42:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:42:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 16:42:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:42:59,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127805380] [2020-10-15 16:42:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:42:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:42:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127805380] [2020-10-15 16:42:59,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275757184] [2020-10-15 16:42:59,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:42:59,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:42:59,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:42:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:42:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:42:59,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:42:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:42:59,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:42:59,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:42:59,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972434446] [2020-10-15 16:42:59,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:42:59,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:42:59,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:42:59,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:42:59,659 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 16:43:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,182 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 16:43:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:00,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,184 INFO L225 Difference]: With dead ends: 72 [2020-10-15 16:43:00,184 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 16:43:00,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 16:43:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 16:43:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:43:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 16:43:00,187 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 16:43:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,188 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 16:43:00,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 16:43:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:00,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,188 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:00,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:43:00,394 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 16:43:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163550343] [2020-10-15 16:43:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163550343] [2020-10-15 16:43:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091026565] [2020-10-15 16:43:00,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:00,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:00,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:00,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462187198] [2020-10-15 16:43:00,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:00,596 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 16:43:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:00,830 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 16:43:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:43:00,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:00,831 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:00,831 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 16:43:00,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:43:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 16:43:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 16:43:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 16:43:00,834 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 16:43:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:00,834 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 16:43:00,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 16:43:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:00,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:00,835 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,036 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 16:43:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48682784] [2020-10-15 16:43:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48682784] [2020-10-15 16:43:01,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746544120] [2020-10-15 16:43:01,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:01,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801760071] [2020-10-15 16:43:01,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:01,230 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 16:43:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:01,513 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 16:43:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:43:01,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:01,514 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:01,515 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:01,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:43:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 16:43:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 16:43:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 16:43:01,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 16:43:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:01,518 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 16:43:01,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 16:43:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:01,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:01,519 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:01,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,727 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 16:43:01,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:01,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498324741] [2020-10-15 16:43:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498324741] [2020-10-15 16:43:01,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583008567] [2020-10-15 16:43:01,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:01,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:01,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:01,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:01,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501734336] [2020-10-15 16:43:01,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:01,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:01,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:01,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:01,919 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 16:43:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,212 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 16:43:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:02,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,213 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:02,213 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:02,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 16:43:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 16:43:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 16:43:02,216 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 16:43:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,217 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 16:43:02,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 16:43:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:02,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,217 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:02,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,418 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 16:43:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:02,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548523465] [2020-10-15 16:43:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548523465] [2020-10-15 16:43:02,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204670487] [2020-10-15 16:43:02,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:02,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:02,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:02,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:02,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061868384] [2020-10-15 16:43:02,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:02,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:02,632 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 16:43:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:02,968 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 16:43:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:02,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:02,969 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:02,970 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:02,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 16:43:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 16:43:02,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 16:43:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:02,972 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 16:43:02,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 16:43:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:02,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:02,973 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,174 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,175 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 16:43:03,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979343071] [2020-10-15 16:43:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979343071] [2020-10-15 16:43:03,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282496231] [2020-10-15 16:43:03,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:03,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:03,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:03,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126796138] [2020-10-15 16:43:03,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:03,361 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 16:43:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:03,699 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:03,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:03,701 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:03,701 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:03,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 16:43:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:43:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 16:43:03,704 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 16:43:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:03,704 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 16:43:03,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 16:43:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:03,704 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:03,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 16:43:03,905 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 16:43:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:03,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929223317] [2020-10-15 16:43:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929223317] [2020-10-15 16:43:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570939918] [2020-10-15 16:43:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:04,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:04,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:04,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:04,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:04,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420908072] [2020-10-15 16:43:04,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:04,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:04,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:04,102 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 16:43:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:04,518 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 16:43:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:04,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:04,520 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:43:04,520 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:43:04,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:43:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 16:43:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 16:43:04,523 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 16:43:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:04,523 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 16:43:04,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 16:43:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:04,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:04,524 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:04,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:04,725 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:04,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 16:43:04,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:04,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648113371] [2020-10-15 16:43:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648113371] [2020-10-15 16:43:04,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643300935] [2020-10-15 16:43:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:04,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:04,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:04,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274019542] [2020-10-15 16:43:04,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:04,900 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 16:43:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:05,292 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 16:43:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:05,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:05,293 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:05,294 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:05,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 16:43:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 16:43:05,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 16:43:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:05,299 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 16:43:05,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 16:43:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:05,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:05,300 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:05,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 16:43:05,505 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 16:43:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:05,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192968057] [2020-10-15 16:43:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192968057] [2020-10-15 16:43:05,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139264141] [2020-10-15 16:43:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:05,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:05,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:05,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:05,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:05,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778783922] [2020-10-15 16:43:05,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:05,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:05,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:05,739 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 16:43:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:06,393 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 16:43:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:06,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:06,395 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:06,395 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:06,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 16:43:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 16:43:06,399 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 16:43:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:06,400 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 16:43:06,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 16:43:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:06,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:06,401 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:06,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:06,611 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 16:43:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:06,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540671087] [2020-10-15 16:43:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540671087] [2020-10-15 16:43:06,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420967933] [2020-10-15 16:43:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:06,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556867094] [2020-10-15 16:43:06,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:06,891 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 16:43:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:07,375 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 16:43:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:07,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:07,376 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:07,377 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:07,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 16:43:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 16:43:07,379 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 16:43:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:07,379 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 16:43:07,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 16:43:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:07,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:07,380 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:07,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:43:07,589 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 16:43:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:07,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671640410] [2020-10-15 16:43:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671640410] [2020-10-15 16:43:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813221298] [2020-10-15 16:43:07,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:07,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:07,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:07,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:07,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:07,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:07,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705842802] [2020-10-15 16:43:07,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:07,788 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 16:43:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:08,345 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 16:43:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:08,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:08,347 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:08,347 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:43:08,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:43:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 16:43:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 16:43:08,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 16:43:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:08,351 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 16:43:08,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 16:43:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:08,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:08,352 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:08,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:08,559 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 16:43:08,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:08,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490914793] [2020-10-15 16:43:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490914793] [2020-10-15 16:43:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714600204] [2020-10-15 16:43:08,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:08,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:08,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:08,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 16:43:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26982951] [2020-10-15 16:43:08,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:43:08,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:43:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:43:08,719 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 16:43:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:09,201 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 16:43:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:09,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 16:43:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:09,203 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:43:09,203 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:43:09,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:43:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 16:43:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 16:43:09,206 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 16:43:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:09,207 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 16:43:09,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:43:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 16:43:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 16:43:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:09,208 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:09,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:09,415 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 16:43:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6625813] [2020-10-15 16:43:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6625813] [2020-10-15 16:43:09,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115329396] [2020-10-15 16:43:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:09,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 16:43:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:09,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:09,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:09,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 16:43:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043394183] [2020-10-15 16:43:09,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:09,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:09,601 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 16:43:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,202 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 16:43:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:10,203 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 16:43:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,204 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:10,204 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:10,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 16:43:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 16:43:10,207 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 16:43:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,207 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 16:43:10,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 16:43:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:10,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,208 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:10,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,409 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 16:43:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:10,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445682292] [2020-10-15 16:43:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445682292] [2020-10-15 16:43:10,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266794441] [2020-10-15 16:43:10,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:10,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:10,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647693805] [2020-10-15 16:43:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:10,626 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 16:43:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:10,911 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 16:43:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:10,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:10,912 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:10,913 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:10,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:43:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 16:43:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:10,916 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:10,916 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:10,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:10,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:10,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,126 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 16:43:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80578005] [2020-10-15 16:43:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80578005] [2020-10-15 16:43:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482325407] [2020-10-15 16:43:11,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:11,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:11,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:11,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:11,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136388985] [2020-10-15 16:43:11,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:11,363 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:11,720 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 16:43:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:11,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:11,722 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:11,722 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:11,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 16:43:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:11,725 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:11,726 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:11,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:11,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:11,726 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:11,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:11,936 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 16:43:11,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:11,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478733465] [2020-10-15 16:43:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478733465] [2020-10-15 16:43:12,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75664654] [2020-10-15 16:43:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:12,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:12,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:12,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135743291] [2020-10-15 16:43:12,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:12,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:12,133 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:12,454 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 16:43:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:12,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:12,456 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:12,456 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:12,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:43:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 16:43:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:12,459 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:12,459 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:12,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:12,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:12,460 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:12,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:12,664 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:12,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 16:43:12,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:12,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20001627] [2020-10-15 16:43:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20001627] [2020-10-15 16:43:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194140318] [2020-10-15 16:43:12,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:12,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:12,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:12,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:12,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873896564] [2020-10-15 16:43:12,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:12,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:12,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:12,886 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:13,315 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 16:43:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:13,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:13,316 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:43:13,316 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:43:13,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:43:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 16:43:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:13,320 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:13,320 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:13,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:13,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:13,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:13,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:13,530 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 16:43:13,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:13,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761287528] [2020-10-15 16:43:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761287528] [2020-10-15 16:43:13,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254615416] [2020-10-15 16:43:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:13,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:13,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:13,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812244560] [2020-10-15 16:43:13,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:13,735 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:14,103 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 16:43:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:14,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:14,105 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:43:14,105 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 16:43:14,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 16:43:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 16:43:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:14,107 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:14,108 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:14,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:14,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:14,108 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:14,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 16:43:14,309 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 16:43:14,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:14,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023405287] [2020-10-15 16:43:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023405287] [2020-10-15 16:43:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181793059] [2020-10-15 16:43:14,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:14,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:14,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:14,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:14,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:14,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169289862] [2020-10-15 16:43:14,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:14,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:14,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:14,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:14,547 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:15,044 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 16:43:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:15,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:15,046 INFO L225 Difference]: With dead ends: 93 [2020-10-15 16:43:15,046 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:15,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 16:43:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:15,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:15,049 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:15,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:15,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:15,049 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:15,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:15,250 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 16:43:15,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:15,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687984139] [2020-10-15 16:43:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687984139] [2020-10-15 16:43:15,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849110937] [2020-10-15 16:43:15,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:15,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:15,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:15,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:15,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260329443] [2020-10-15 16:43:15,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:15,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:15,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:15,436 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:15,854 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 16:43:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:15,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:15,855 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:15,855 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:15,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 16:43:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:15,859 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:15,859 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:15,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:15,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:15,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:16,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 16:43:16,068 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 16:43:16,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:16,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591056045] [2020-10-15 16:43:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591056045] [2020-10-15 16:43:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195453926] [2020-10-15 16:43:16,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:16,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:16,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:16,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:16,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:16,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718593758] [2020-10-15 16:43:16,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:16,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:16,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:16,268 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:16,852 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 16:43:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:16,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:16,853 INFO L225 Difference]: With dead ends: 89 [2020-10-15 16:43:16,853 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 16:43:16,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 16:43:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 16:43:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:16,856 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:16,856 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:16,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:16,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:16,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:17,067 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 16:43:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129266946] [2020-10-15 16:43:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129266946] [2020-10-15 16:43:17,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121572620] [2020-10-15 16:43:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:17,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 16:43:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:17,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:17,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798786083] [2020-10-15 16:43:17,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:17,258 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:17,734 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 16:43:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:17,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:17,736 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:43:17,736 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:17,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 16:43:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:17,740 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 16:43:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:17,740 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:17,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:17,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:17,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:17,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:17,944 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 16:43:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:17,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507245266] [2020-10-15 16:43:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507245266] [2020-10-15 16:43:18,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531125995] [2020-10-15 16:43:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 16:43:18,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:18,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:18,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:18,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:18,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:18,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636849161] [2020-10-15 16:43:18,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:18,146 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 16:43:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:18,786 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 16:43:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:18,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:18,787 INFO L225 Difference]: With dead ends: 85 [2020-10-15 16:43:18,787 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:18,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 16:43:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:18,790 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 16:43:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:18,790 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:18,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:18,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:18,791 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:18,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:18,992 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 16:43:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:18,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367125645] [2020-10-15 16:43:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367125645] [2020-10-15 16:43:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623551463] [2020-10-15 16:43:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:19,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:19,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 16:43:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955027345] [2020-10-15 16:43:19,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:43:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:43:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:43:19,166 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 16:43:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:19,691 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:43:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:19,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 16:43:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:19,693 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:19,693 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:19,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 16:43:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:43:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 16:43:19,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 16:43:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:19,696 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 16:43:19,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:43:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 16:43:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:19,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:19,697 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:19,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:19,906 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 16:43:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:19,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596868522] [2020-10-15 16:43:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596868522] [2020-10-15 16:43:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258448754] [2020-10-15 16:43:20,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:20,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:20,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:20,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:20,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:20,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332930572] [2020-10-15 16:43:20,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:20,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:20,114 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 16:43:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:20,792 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-15 16:43:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:20,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:20,794 INFO L225 Difference]: With dead ends: 82 [2020-10-15 16:43:20,794 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 16:43:20,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 16:43:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-15 16:43:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 16:43:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 16:43:20,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 16:43:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 16:43:20,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 16:43:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 16:43:20,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:20,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:21,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:21,005 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 16:43:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:21,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559935317] [2020-10-15 16:43:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559935317] [2020-10-15 16:43:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092398096] [2020-10-15 16:43:21,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:21,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 16:43:21,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:43:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:21,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:21,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:21,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 16:43:21,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392745743] [2020-10-15 16:43:21,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:21,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:21,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:21,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:21,200 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 16:43:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:21,810 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:21,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 16:43:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:21,812 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:21,812 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:43:21,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:43:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 16:43:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:21,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 16:43:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:21,815 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:21,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:21,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:21,816 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:22,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:22,016 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 16:43:22,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:22,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959886905] [2020-10-15 16:43:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959886905] [2020-10-15 16:43:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093280864] [2020-10-15 16:43:22,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:22,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:22,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:22,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:22,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:22,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316454888] [2020-10-15 16:43:22,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:22,227 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 16:43:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:22,918 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 16:43:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:22,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:22,920 INFO L225 Difference]: With dead ends: 78 [2020-10-15 16:43:22,920 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 16:43:22,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 16:43:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 16:43:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 16:43:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 16:43:22,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 16:43:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:22,923 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 16:43:22,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 16:43:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:22,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:22,924 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:23,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 16:43:23,124 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 16:43:23,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:23,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844768761] [2020-10-15 16:43:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844768761] [2020-10-15 16:43:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501485296] [2020-10-15 16:43:23,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:23,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:23,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:23,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167226001] [2020-10-15 16:43:23,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:23,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:23,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:23,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:23,369 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 16:43:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:23,647 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 16:43:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:43:23,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:23,649 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:23,649 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 16:43:23,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:43:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 16:43:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 16:43:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 16:43:23,651 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 16:43:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:23,651 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 16:43:23,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 16:43:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:23,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:23,652 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:23,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:23,852 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 16:43:23,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:23,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080808471] [2020-10-15 16:43:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080808471] [2020-10-15 16:43:24,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301262940] [2020-10-15 16:43:24,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:24,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:24,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:24,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:24,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719416656] [2020-10-15 16:43:24,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:24,117 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 16:43:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:24,434 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 16:43:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:43:24,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:24,436 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:43:24,436 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:43:24,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:43:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:43:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 16:43:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 16:43:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 16:43:24,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 16:43:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:24,439 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 16:43:24,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 16:43:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:24,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:24,440 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:24,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 16:43:24,649 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 16:43:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:24,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802848715] [2020-10-15 16:43:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802848715] [2020-10-15 16:43:24,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26084834] [2020-10-15 16:43:24,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19295940] [2020-10-15 16:43:24,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:24,886 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 16:43:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:25,319 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 16:43:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:25,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:25,321 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:25,321 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:25,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 16:43:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 16:43:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 16:43:25,324 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 16:43:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:25,325 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 16:43:25,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 16:43:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:25,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:25,325 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:25,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,533 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 16:43:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:25,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173535154] [2020-10-15 16:43:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173535154] [2020-10-15 16:43:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879449662] [2020-10-15 16:43:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:25,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:25,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:25,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:25,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:25,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840637169] [2020-10-15 16:43:25,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:25,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:25,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:25,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:25,859 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 16:43:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:26,252 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 16:43:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:26,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:26,254 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:26,254 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:26,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 16:43:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:43:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 16:43:26,257 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 16:43:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:26,257 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 16:43:26,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 16:43:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:26,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:26,257 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:26,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,458 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 16:43:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:26,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633184153] [2020-10-15 16:43:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633184153] [2020-10-15 16:43:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390119038] [2020-10-15 16:43:26,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:26,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:26,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:26,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981256864] [2020-10-15 16:43:26,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:26,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:26,696 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 16:43:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:27,136 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 16:43:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:27,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:27,138 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:43:27,138 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:43:27,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:43:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 16:43:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:43:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 16:43:27,141 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 16:43:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:27,141 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 16:43:27,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 16:43:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:27,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:27,142 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:27,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:43:27,346 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 16:43:27,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:27,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775076750] [2020-10-15 16:43:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775076750] [2020-10-15 16:43:27,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554419341] [2020-10-15 16:43:27,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:27,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:27,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:27,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:27,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:27,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574939213] [2020-10-15 16:43:27,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:27,591 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 16:43:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,087 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 16:43:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:28,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,089 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:28,089 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:28,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 16:43:28,093 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 16:43:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,093 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 16:43:28,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 16:43:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:28,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,094 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:28,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:43:28,304 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 16:43:28,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:28,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878297672] [2020-10-15 16:43:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878297672] [2020-10-15 16:43:28,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273793595] [2020-10-15 16:43:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:28,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:28,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:28,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:28,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066516306] [2020-10-15 16:43:28,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:28,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:28,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:28,515 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 16:43:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:28,979 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 16:43:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:28,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:28,980 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:28,981 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:28,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 16:43:28,983 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 16:43:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:28,983 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 16:43:28,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 16:43:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:28,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:28,984 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:29,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:29,185 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 16:43:29,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:29,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020638005] [2020-10-15 16:43:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020638005] [2020-10-15 16:43:29,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328307838] [2020-10-15 16:43:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:29,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:29,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:29,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:29,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:29,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225344177] [2020-10-15 16:43:29,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:29,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:29,420 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 16:43:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:29,977 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 16:43:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:29,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:29,978 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:29,978 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:29,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 16:43:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 16:43:29,982 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 16:43:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:29,982 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 16:43:29,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 16:43:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:29,983 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:30,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:43:30,187 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:30,187 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 16:43:30,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:30,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731825478] [2020-10-15 16:43:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731825478] [2020-10-15 16:43:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629261905] [2020-10-15 16:43:30,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:30,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:30,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:30,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69662526] [2020-10-15 16:43:30,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:30,389 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 16:43:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:30,908 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 16:43:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:30,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:30,910 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:43:30,910 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:43:30,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:43:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 16:43:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 16:43:30,913 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 16:43:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:30,914 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 16:43:30,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 16:43:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:30,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:30,914 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:31,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:31,118 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 16:43:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:31,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165406531] [2020-10-15 16:43:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165406531] [2020-10-15 16:43:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063708075] [2020-10-15 16:43:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:31,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:31,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:31,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:31,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:31,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126868741] [2020-10-15 16:43:31,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:31,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:31,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:31,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:31,340 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 16:43:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:31,960 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 16:43:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:31,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:31,962 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:43:31,962 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:43:31,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:43:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 16:43:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 16:43:31,965 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 16:43:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:31,965 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 16:43:31,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 16:43:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:31,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:31,966 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:32,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 16:43:32,168 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 16:43:32,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:32,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268490233] [2020-10-15 16:43:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268490233] [2020-10-15 16:43:32,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427801709] [2020-10-15 16:43:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:32,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:32,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:32,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:32,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119127545] [2020-10-15 16:43:32,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:32,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:32,373 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 16:43:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:32,954 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 16:43:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:32,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:32,955 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:32,956 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:32,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 16:43:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:43:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 16:43:32,958 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 16:43:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:32,958 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 16:43:32,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 16:43:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:32,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:32,959 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:33,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:33,159 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:33,160 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 16:43:33,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:33,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853864523] [2020-10-15 16:43:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853864523] [2020-10-15 16:43:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146297364] [2020-10-15 16:43:33,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:33,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:33,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:33,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:33,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173902058] [2020-10-15 16:43:33,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:33,437 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 16:43:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:34,138 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 16:43:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:34,138 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:34,139 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:34,139 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:34,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 16:43:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:43:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 16:43:34,142 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 16:43:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 16:43:34,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 16:43:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:34,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:34,143 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:34,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:43:34,352 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 16:43:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:34,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378010252] [2020-10-15 16:43:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378010252] [2020-10-15 16:43:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123813295] [2020-10-15 16:43:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:34,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:34,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:34,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:34,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 16:43:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278713711] [2020-10-15 16:43:34,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:43:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:34,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:43:34,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:43:34,538 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 16:43:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:35,132 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:43:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:35,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 16:43:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:35,134 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:43:35,134 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:43:35,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:43:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 16:43:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 16:43:35,137 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 16:43:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:35,137 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 16:43:35,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:43:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 16:43:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 16:43:35,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:35,138 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:35,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:43:35,341 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 16:43:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:35,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549322887] [2020-10-15 16:43:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549322887] [2020-10-15 16:43:35,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765151937] [2020-10-15 16:43:35,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:35,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:35,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 16:43:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:35,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:35,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:35,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 16:43:35,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135157831] [2020-10-15 16:43:35,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:35,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:35,565 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 16:43:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:36,319 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 16:43:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:36,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 16:43:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:36,321 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:43:36,321 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:36,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 16:43:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:43:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 16:43:36,325 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 16:43:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:36,325 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 16:43:36,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 16:43:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:36,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:36,326 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:36,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,535 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 16:43:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:36,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49438112] [2020-10-15 16:43:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49438112] [2020-10-15 16:43:36,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970878160] [2020-10-15 16:43:36,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:36,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:36,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594325376] [2020-10-15 16:43:36,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:36,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:36,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:36,838 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 16:43:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:37,139 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 16:43:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:37,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:37,140 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:43:37,140 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:43:37,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:43:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:43:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 16:43:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:37,143 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:37,143 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:37,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:37,144 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:37,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:37,351 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 16:43:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129054843] [2020-10-15 16:43:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129054843] [2020-10-15 16:43:37,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329983698] [2020-10-15 16:43:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:37,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:37,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:37,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:37,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536895643] [2020-10-15 16:43:37,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:37,628 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:38,072 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 16:43:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:38,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:38,073 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:43:38,073 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:43:38,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:43:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 16:43:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:38,076 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:38,076 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:38,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:38,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:38,076 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:38,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:43:38,277 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 16:43:38,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:38,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125920023] [2020-10-15 16:43:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125920023] [2020-10-15 16:43:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347451613] [2020-10-15 16:43:38,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:38,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:38,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:38,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:38,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:38,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490503601] [2020-10-15 16:43:38,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:38,543 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:38,942 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:43:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:43:38,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:38,944 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:43:38,944 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:43:38,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:43:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:43:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 16:43:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:38,947 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:38,947 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:38,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:38,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:38,948 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:39,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:39,155 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 16:43:39,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:39,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833365214] [2020-10-15 16:43:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833365214] [2020-10-15 16:43:39,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507256422] [2020-10-15 16:43:39,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:39,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:39,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:39,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:39,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:39,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:39,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854641144] [2020-10-15 16:43:39,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:39,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:39,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:39,419 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:39,908 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 16:43:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:39,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:39,909 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:39,909 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:39,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:43:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 16:43:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:39,912 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:39,914 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:39,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:39,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:39,914 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:40,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 16:43:40,115 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 16:43:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:40,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496878759] [2020-10-15 16:43:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496878759] [2020-10-15 16:43:40,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627874786] [2020-10-15 16:43:40,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:40,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:40,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:40,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:40,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:40,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973499416] [2020-10-15 16:43:40,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:40,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:40,344 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:40,802 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 16:43:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:40,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:40,804 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:43:40,804 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:43:40,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:43:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 16:43:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:40,807 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:40,807 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:40,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:40,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:40,808 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:41,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:43:41,015 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 16:43:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:41,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225208930] [2020-10-15 16:43:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225208930] [2020-10-15 16:43:41,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128693064] [2020-10-15 16:43:41,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:41,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:41,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:41,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:41,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:41,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:41,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759586913] [2020-10-15 16:43:41,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:41,290 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:41,997 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 16:43:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:41,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:41,998 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:43:41,999 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:43:41,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:43:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 16:43:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:42,002 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:42,002 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:42,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:42,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:42,003 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 16:43:42,211 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 16:43:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:42,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552598994] [2020-10-15 16:43:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552598994] [2020-10-15 16:43:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758350676] [2020-10-15 16:43:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:42,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:42,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:42,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299250326] [2020-10-15 16:43:42,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:42,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:42,486 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:42,987 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 16:43:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:42,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:42,988 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:42,988 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 16:43:42,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 16:43:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 16:43:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:42,991 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:42,992 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:42,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:42,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:42,993 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:43,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,201 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 16:43:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:43,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510714806] [2020-10-15 16:43:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510714806] [2020-10-15 16:43:43,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090846516] [2020-10-15 16:43:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:43,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:43,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:43,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:43,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:43,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:43,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985086743] [2020-10-15 16:43:43,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:43,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:43,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:43,451 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:44,121 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:43:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:43:44,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:44,123 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:43:44,123 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:43:44,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:43:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:43:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 16:43:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:44,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:44,125 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:44,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:44,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:44,126 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:44,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 16:43:44,326 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 16:43:44,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:44,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371509100] [2020-10-15 16:43:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371509100] [2020-10-15 16:43:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267650827] [2020-10-15 16:43:44,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:44,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:44,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:44,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:44,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820857030] [2020-10-15 16:43:44,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:44,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:44,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:44,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:44,547 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:45,106 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 16:43:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:43:45,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:45,108 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:43:45,108 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:43:45,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:43:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 16:43:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:45,110 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:45,111 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:45,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:45,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:45,111 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:45,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:45,315 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 16:43:45,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:45,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898590781] [2020-10-15 16:43:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898590781] [2020-10-15 16:43:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206363394] [2020-10-15 16:43:45,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:45,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:45,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:45,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:45,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:45,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:45,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424202516] [2020-10-15 16:43:45,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:45,564 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:46,356 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 16:43:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:43:46,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:46,358 INFO L225 Difference]: With dead ends: 95 [2020-10-15 16:43:46,358 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 16:43:46,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:43:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 16:43:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 16:43:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:46,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:46,361 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:46,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:46,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:46,362 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:46,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:46,563 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 16:43:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488750445] [2020-10-15 16:43:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488750445] [2020-10-15 16:43:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542262174] [2020-10-15 16:43:46,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:46,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 16:43:46,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:46,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:46,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:46,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267633773] [2020-10-15 16:43:46,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:46,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:46,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:46,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:46,821 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:47,573 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 16:43:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:43:47,574 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:47,574 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:43:47,574 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:43:47,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:43:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:43:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 16:43:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:43:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:43:47,577 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 16:43:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:47,577 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:43:47,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:43:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:47,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:47,578 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:47,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:47,779 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 16:43:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:47,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325092481] [2020-10-15 16:43:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325092481] [2020-10-15 16:43:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728871050] [2020-10-15 16:43:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:47,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 16:43:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:47,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:48,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:48,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:48,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343911037] [2020-10-15 16:43:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:48,039 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 16:43:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:48,944 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 16:43:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:43:48,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:48,946 INFO L225 Difference]: With dead ends: 91 [2020-10-15 16:43:48,946 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:43:48,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:43:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:43:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 16:43:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:43:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:43:48,949 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 16:43:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:48,950 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:43:48,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:43:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:48,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:48,951 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:49,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:49,152 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 16:43:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:49,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786631278] [2020-10-15 16:43:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786631278] [2020-10-15 16:43:49,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21603481] [2020-10-15 16:43:49,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:49,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:49,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 16:43:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646448854] [2020-10-15 16:43:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:43:49,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:49,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:43:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:43:49,377 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 16:43:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:50,037 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:43:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:50,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 16:43:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:50,039 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:50,039 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:50,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:43:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 16:43:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:43:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 16:43:50,042 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 16:43:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:50,042 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 16:43:50,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:43:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 16:43:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:50,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:50,043 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:50,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:43:50,249 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 16:43:50,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:50,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424200097] [2020-10-15 16:43:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424200097] [2020-10-15 16:43:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559642723] [2020-10-15 16:43:50,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:50,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:50,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:50,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:50,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:50,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:50,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486285288] [2020-10-15 16:43:50,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:50,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:50,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:50,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:50,479 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 16:43:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:51,335 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 16:43:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:43:51,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:51,337 INFO L225 Difference]: With dead ends: 88 [2020-10-15 16:43:51,337 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:43:51,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:43:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:43:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 16:43:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 16:43:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 16:43:51,340 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 16:43:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:51,340 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 16:43:51,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 16:43:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 16:43:51,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:51,340 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:51,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 16:43:51,541 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 16:43:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405017133] [2020-10-15 16:43:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405017133] [2020-10-15 16:43:51,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920071720] [2020-10-15 16:43:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:51,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 16:43:51,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:51,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 16:43:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:51,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:51,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 16:43:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108623736] [2020-10-15 16:43:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:51,787 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 16:43:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:52,633 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 16:43:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:52,633 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 16:43:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:52,634 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:43:52,634 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:43:52,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:43:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:43:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 16:43:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:43:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:43:52,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 16:43:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:52,637 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:43:52,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:43:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:52,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:52,637 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:52,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:43:52,838 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 16:43:52,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:52,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678423024] [2020-10-15 16:43:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678423024] [2020-10-15 16:43:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810615518] [2020-10-15 16:43:53,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:53,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:53,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:43:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:53,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:53,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403432995] [2020-10-15 16:43:53,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:53,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:53,094 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 16:43:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:53,971 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 16:43:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:43:53,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:53,972 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:43:53,972 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 16:43:53,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:43:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 16:43:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 16:43:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 16:43:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 16:43:53,975 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 16:43:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:53,975 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 16:43:53,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 16:43:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:53,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:53,976 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:54,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:43:54,177 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 16:43:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145361565] [2020-10-15 16:43:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145361565] [2020-10-15 16:43:54,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590124903] [2020-10-15 16:43:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:54,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:43:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:54,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:54,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:54,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395481147] [2020-10-15 16:43:54,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:54,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:54,467 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 16:43:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:54,825 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 16:43:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:43:54,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:54,826 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:43:54,826 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 16:43:54,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:43:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 16:43:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 16:43:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 16:43:54,829 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 16:43:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:54,829 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 16:43:54,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 16:43:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:54,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:54,831 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:55,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:55,038 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:55,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 16:43:55,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:55,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560067249] [2020-10-15 16:43:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560067249] [2020-10-15 16:43:55,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358922] [2020-10-15 16:43:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:55,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:43:55,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:55,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:55,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:55,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817331200] [2020-10-15 16:43:55,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:55,340 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 16:43:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:55,719 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 16:43:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:43:55,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:55,721 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:43:55,721 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:43:55,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:43:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:43:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 16:43:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:43:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 16:43:55,724 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 16:43:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:55,724 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 16:43:55,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 16:43:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:55,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:55,725 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:55,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 16:43:55,931 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:55,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 16:43:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:55,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014500607] [2020-10-15 16:43:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014500607] [2020-10-15 16:43:56,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113769156] [2020-10-15 16:43:56,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:56,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:56,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:56,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368771987] [2020-10-15 16:43:56,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:56,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:56,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:56,203 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 16:43:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:56,624 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 16:43:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:43:56,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:56,625 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:43:56,625 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:43:56,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:43:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:43:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 16:43:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 16:43:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 16:43:56,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 16:43:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:56,629 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 16:43:56,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 16:43:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:56,630 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:56,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:43:56,838 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:56,838 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 16:43:56,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:56,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309775961] [2020-10-15 16:43:56,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309775961] [2020-10-15 16:43:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176128973] [2020-10-15 16:43:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:57,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:43:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:57,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:57,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:57,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:57,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807285852] [2020-10-15 16:43:57,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:57,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:57,132 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 16:43:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:57,620 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 16:43:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:43:57,620 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:57,621 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:43:57,621 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:43:57,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:43:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:43:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 16:43:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:43:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 16:43:57,623 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 16:43:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:57,624 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 16:43:57,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 16:43:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:57,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:57,624 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:57,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 16:43:57,825 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 16:43:57,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:57,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322840388] [2020-10-15 16:43:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322840388] [2020-10-15 16:43:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202544110] [2020-10-15 16:43:58,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:58,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:43:58,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:58,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:43:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221871817] [2020-10-15 16:43:58,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:43:58,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:43:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:43:58,092 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 16:43:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:58,582 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 16:43:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:43:58,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:43:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:58,583 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:43:58,583 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:43:58,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:43:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:43:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 16:43:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 16:43:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 16:43:58,585 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 16:43:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:58,585 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 16:43:58,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:43:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 16:43:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:58,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:58,586 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:58,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:58,794 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 16:43:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:58,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723156883] [2020-10-15 16:43:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:43:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723156883] [2020-10-15 16:43:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690093099] [2020-10-15 16:43:59,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:59,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:43:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:43:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:43:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:43:59,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:43:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:43:59,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:43:59,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:43:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039950124] [2020-10-15 16:43:59,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:43:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:43:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:43:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:43:59,143 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 16:43:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:43:59,718 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 16:43:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:43:59,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:43:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:43:59,719 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:43:59,720 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:43:59,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:43:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:43:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 16:43:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:43:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 16:43:59,722 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 16:43:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:43:59,722 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 16:43:59,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:43:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 16:43:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:43:59,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:43:59,723 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:43:59,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:43:59,924 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:43:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:43:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 16:43:59,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:43:59,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688401595] [2020-10-15 16:43:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:43:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688401595] [2020-10-15 16:44:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918956047] [2020-10-15 16:44:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:00,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:00,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131875222] [2020-10-15 16:44:00,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:00,187 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 16:44:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:00,724 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 16:44:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:00,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:00,725 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:00,725 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:00,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 16:44:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 16:44:00,727 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 16:44:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:00,727 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 16:44:00,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 16:44:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:00,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:00,728 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:00,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:00,928 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 16:44:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:00,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470480286] [2020-10-15 16:44:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470480286] [2020-10-15 16:44:01,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837611312] [2020-10-15 16:44:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:01,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:01,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:01,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:01,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706990198] [2020-10-15 16:44:01,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:01,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:01,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:01,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:01,206 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 16:44:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:01,846 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 16:44:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:01,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:01,848 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:01,848 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:01,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 16:44:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 16:44:01,852 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 16:44:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:01,853 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 16:44:01,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 16:44:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:01,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:01,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:02,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:44:02,061 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 16:44:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:02,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260585587] [2020-10-15 16:44:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260585587] [2020-10-15 16:44:02,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099734279] [2020-10-15 16:44:02,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:02,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:02,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676917471] [2020-10-15 16:44:02,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:02,312 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 16:44:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:02,937 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 16:44:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:02,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:02,938 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:02,938 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:02,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 16:44:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 16:44:02,940 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 16:44:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:02,941 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 16:44:02,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 16:44:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:02,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:02,941 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:03,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,146 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 16:44:03,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:03,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450898122] [2020-10-15 16:44:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450898122] [2020-10-15 16:44:03,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259268985] [2020-10-15 16:44:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:03,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:03,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:03,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:03,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190851079] [2020-10-15 16:44:03,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:03,405 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 16:44:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:04,162 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 16:44:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:04,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:04,163 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:44:04,163 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:44:04,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:44:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 16:44:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 16:44:04,166 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 16:44:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:04,166 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 16:44:04,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 16:44:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:04,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:04,167 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:04,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:44:04,368 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 16:44:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:04,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774400137] [2020-10-15 16:44:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774400137] [2020-10-15 16:44:04,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491865936] [2020-10-15 16:44:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:04,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:04,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:04,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:04,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840387706] [2020-10-15 16:44:04,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:04,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:04,615 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 16:44:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:05,264 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 16:44:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:05,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:05,266 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:05,266 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:05,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 16:44:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 16:44:05,268 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 16:44:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:05,269 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 16:44:05,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 16:44:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:05,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:05,269 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:05,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:44:05,470 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 16:44:05,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650347274] [2020-10-15 16:44:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650347274] [2020-10-15 16:44:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554205827] [2020-10-15 16:44:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:05,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:05,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:05,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:05,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:05,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:05,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495597421] [2020-10-15 16:44:05,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:05,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:05,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:05,740 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 16:44:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:06,575 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 16:44:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:06,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:06,576 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:06,576 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:06,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 16:44:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 16:44:06,579 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 16:44:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:06,579 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 16:44:06,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 16:44:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:06,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:06,580 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:06,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 16:44:06,780 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 16:44:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:06,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258402932] [2020-10-15 16:44:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:06,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258402932] [2020-10-15 16:44:06,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942589782] [2020-10-15 16:44:06,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:07,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:07,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:07,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:07,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685848805] [2020-10-15 16:44:07,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:07,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:07,031 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 16:44:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:07,841 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 16:44:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:07,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:07,842 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:44:07,842 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:44:07,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:44:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 16:44:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:44:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 16:44:07,845 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 16:44:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:07,845 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 16:44:07,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 16:44:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:07,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:07,845 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:08,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:08,046 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 16:44:08,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:08,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692352405] [2020-10-15 16:44:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692352405] [2020-10-15 16:44:08,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902850367] [2020-10-15 16:44:08,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:08,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:08,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:08,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:08,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:08,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:08,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444965520] [2020-10-15 16:44:08,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:08,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:08,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:08,311 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 16:44:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:09,193 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 16:44:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:09,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:09,194 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:09,194 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:44:09,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:44:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 16:44:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 16:44:09,197 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 16:44:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:09,197 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 16:44:09,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 16:44:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:09,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:09,198 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:09,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:44:09,406 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 16:44:09,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:09,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562801011] [2020-10-15 16:44:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562801011] [2020-10-15 16:44:09,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510096801] [2020-10-15 16:44:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:09,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:09,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 16:44:09,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348537921] [2020-10-15 16:44:09,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:44:09,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:44:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:44:09,642 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 16:44:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:10,419 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 16:44:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:10,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 16:44:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:10,420 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:44:10,420 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:44:10,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:44:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 16:44:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 16:44:10,423 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 16:44:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:10,423 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 16:44:10,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:44:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 16:44:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 16:44:10,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:10,423 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:10,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:10,624 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 16:44:10,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:10,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185625145] [2020-10-15 16:44:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185625145] [2020-10-15 16:44:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838381541] [2020-10-15 16:44:10,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 16:44:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:10,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:10,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:10,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 16:44:10,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420231189] [2020-10-15 16:44:10,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:10,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:10,893 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 16:44:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:11,820 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 16:44:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:11,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 16:44:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:11,821 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:11,821 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:44:11,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:44:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 16:44:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 16:44:11,823 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 16:44:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:11,823 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 16:44:11,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 16:44:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:11,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:11,824 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:12,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:12,025 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 16:44:12,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:12,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286244326] [2020-10-15 16:44:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286244326] [2020-10-15 16:44:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281097053] [2020-10-15 16:44:12,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:12,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:12,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:12,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:12,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:12,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893595717] [2020-10-15 16:44:12,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:12,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:12,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:12,342 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 16:44:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:12,763 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 16:44:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:12,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:12,764 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:12,764 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:12,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:44:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 16:44:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:12,767 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:12,767 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:12,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:12,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:12,768 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:12,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:12,969 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 16:44:12,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:12,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568171456] [2020-10-15 16:44:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568171456] [2020-10-15 16:44:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925006078] [2020-10-15 16:44:13,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:13,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:13,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:13,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:13,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:13,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89157754] [2020-10-15 16:44:13,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:13,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:13,318 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:13,842 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:13,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:13,843 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:13,843 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:13,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 16:44:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:13,845 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:13,845 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:13,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:13,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:13,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:14,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:14,046 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 16:44:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:14,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332774050] [2020-10-15 16:44:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332774050] [2020-10-15 16:44:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081812882] [2020-10-15 16:44:14,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:14,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:14,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:14,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:14,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:14,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535556860] [2020-10-15 16:44:14,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:14,342 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:14,826 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:44:14,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:14,827 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:14,827 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:14,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:44:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 16:44:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:14,830 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:14,830 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:14,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:14,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:14,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:15,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:15,035 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 16:44:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:15,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316289549] [2020-10-15 16:44:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316289549] [2020-10-15 16:44:15,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924079716] [2020-10-15 16:44:15,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:15,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:15,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:15,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:15,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081193326] [2020-10-15 16:44:15,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:15,374 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:15,981 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 16:44:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:15,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:15,982 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:15,982 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:44:15,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:44:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:44:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 16:44:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:15,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:15,985 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:15,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:15,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:15,985 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:16,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:44:16,186 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:16,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 16:44:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:16,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269107526] [2020-10-15 16:44:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269107526] [2020-10-15 16:44:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348854260] [2020-10-15 16:44:16,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:16,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:16,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:16,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43457064] [2020-10-15 16:44:16,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:16,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:16,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:16,479 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:17,027 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 16:44:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:17,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:17,028 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:17,028 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:17,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 16:44:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:17,031 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:17,031 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:17,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:17,032 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:17,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:44:17,234 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 16:44:17,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866427400] [2020-10-15 16:44:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866427400] [2020-10-15 16:44:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090816324] [2020-10-15 16:44:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:17,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:17,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:17,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:17,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472803780] [2020-10-15 16:44:17,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:17,570 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:18,308 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 16:44:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:18,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:18,309 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:18,309 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:18,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 16:44:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:18,312 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:18,312 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:18,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:18,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:18,313 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:18,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:44:18,521 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 16:44:18,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:18,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102815781] [2020-10-15 16:44:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102815781] [2020-10-15 16:44:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182387097] [2020-10-15 16:44:18,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:18,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:18,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:18,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:18,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460015943] [2020-10-15 16:44:18,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:18,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:18,807 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:19,416 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 16:44:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:19,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:19,418 INFO L225 Difference]: With dead ends: 110 [2020-10-15 16:44:19,418 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 16:44:19,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 16:44:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 16:44:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:19,421 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:19,421 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:19,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:19,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:19,421 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:19,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:44:19,622 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 16:44:19,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:19,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182975292] [2020-10-15 16:44:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182975292] [2020-10-15 16:44:19,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336799610] [2020-10-15 16:44:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:19,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:19,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:19,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:19,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361477192] [2020-10-15 16:44:19,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:19,929 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:20,710 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 16:44:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:20,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:20,712 INFO L225 Difference]: With dead ends: 109 [2020-10-15 16:44:20,712 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:20,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 16:44:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:20,714 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:20,714 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:20,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:20,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:20,715 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:20,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:20,916 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:20,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 16:44:20,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:20,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093954149] [2020-10-15 16:44:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093954149] [2020-10-15 16:44:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641054650] [2020-10-15 16:44:21,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:21,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:21,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:21,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:21,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734250418] [2020-10-15 16:44:21,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:21,187 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:21,875 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 16:44:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:21,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:21,876 INFO L225 Difference]: With dead ends: 106 [2020-10-15 16:44:21,877 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:44:21,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:44:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 16:44:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:21,879 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:21,879 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:21,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:21,880 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:22,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 16:44:22,081 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 16:44:22,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:22,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456767695] [2020-10-15 16:44:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456767695] [2020-10-15 16:44:22,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030112754] [2020-10-15 16:44:22,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:22,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:22,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:22,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:22,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:22,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521718317] [2020-10-15 16:44:22,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:22,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:22,390 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:23,256 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 16:44:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:23,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:23,257 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:44:23,257 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 16:44:23,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 16:44:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 16:44:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:23,260 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:23,260 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:23,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:23,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:23,261 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:23,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:23,462 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 16:44:23,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:23,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124998860] [2020-10-15 16:44:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124998860] [2020-10-15 16:44:23,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756240316] [2020-10-15 16:44:23,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:23,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:23,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973342387] [2020-10-15 16:44:23,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:23,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:23,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:23,735 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:24,488 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 16:44:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:24,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:24,489 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:44:24,490 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:44:24,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:44:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 16:44:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:24,492 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:24,493 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:24,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:24,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:24,493 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:24,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:24,694 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 16:44:24,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:24,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110958700] [2020-10-15 16:44:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110958700] [2020-10-15 16:44:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246713719] [2020-10-15 16:44:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:24,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:24,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:24,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:24,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:24,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:24,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316786331] [2020-10-15 16:44:24,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:24,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:24,987 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:25,948 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 16:44:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:25,949 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:25,950 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:44:25,950 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 16:44:25,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 16:44:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 16:44:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:25,953 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:25,953 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:25,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:25,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:25,954 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:26,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 16:44:26,155 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 16:44:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:26,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31124787] [2020-10-15 16:44:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31124787] [2020-10-15 16:44:26,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720798638] [2020-10-15 16:44:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:26,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 16:44:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:26,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:26,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:26,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722258501] [2020-10-15 16:44:26,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:26,406 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:27,203 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 16:44:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:27,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:27,204 INFO L225 Difference]: With dead ends: 98 [2020-10-15 16:44:27,204 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:44:27,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:44:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 16:44:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:27,206 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 16:44:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:27,207 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:27,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:27,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:27,207 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:27,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,408 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:27,408 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 16:44:27,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:27,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174309018] [2020-10-15 16:44:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174309018] [2020-10-15 16:44:27,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357078572] [2020-10-15 16:44:27,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:27,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:27,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:27,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:27,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:27,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298450662] [2020-10-15 16:44:27,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:27,693 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 16:44:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:28,745 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 16:44:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:28,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:28,747 INFO L225 Difference]: With dead ends: 97 [2020-10-15 16:44:28,747 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:44:28,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:44:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 16:44:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:28,750 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 16:44:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:28,750 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:28,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:28,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:28,750 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:28,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:44:28,951 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:28,952 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 16:44:28,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:28,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925841293] [2020-10-15 16:44:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925841293] [2020-10-15 16:44:29,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613484526] [2020-10-15 16:44:29,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:29,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 16:44:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:29,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:29,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:29,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 16:44:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811036703] [2020-10-15 16:44:29,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:44:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:44:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:44:29,213 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 16:44:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:30,052 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 16:44:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:30,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 16:44:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:30,053 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:44:30,054 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 16:44:30,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 16:44:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 16:44:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:44:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 16:44:30,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 16:44:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:30,057 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 16:44:30,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:44:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 16:44:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:30,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:30,057 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:30,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:44:30,258 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 16:44:30,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:30,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027671349] [2020-10-15 16:44:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027671349] [2020-10-15 16:44:30,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862175541] [2020-10-15 16:44:30,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:30,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 16:44:30,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:30,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:30,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:30,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336475166] [2020-10-15 16:44:30,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:30,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:30,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:30,556 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 16:44:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:31,665 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 16:44:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:44:31,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:31,667 INFO L225 Difference]: With dead ends: 94 [2020-10-15 16:44:31,667 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 16:44:31,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 16:44:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 16:44:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 16:44:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 16:44:31,669 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 16:44:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:31,670 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 16:44:31,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 16:44:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 16:44:31,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:31,670 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:31,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:44:31,871 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 16:44:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:31,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908177379] [2020-10-15 16:44:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908177379] [2020-10-15 16:44:32,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129536441] [2020-10-15 16:44:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 16:44:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:32,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 16:44:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956724312] [2020-10-15 16:44:32,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:32,154 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 16:44:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:33,168 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:44:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:33,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 16:44:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:33,169 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:44:33,169 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 16:44:33,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 16:44:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 16:44:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:33,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 16:44:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:33,172 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:33,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:33,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:33,172 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:33,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:44:33,373 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 16:44:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:33,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862151907] [2020-10-15 16:44:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862151907] [2020-10-15 16:44:33,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389869620] [2020-10-15 16:44:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:33,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:33,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:44:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:33,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:33,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458181267] [2020-10-15 16:44:33,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:33,693 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 16:44:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:34,818 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 16:44:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:34,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:34,820 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:44:34,820 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 16:44:34,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 16:44:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 16:44:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 16:44:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 16:44:34,822 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 16:44:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:34,822 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 16:44:34,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 16:44:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:34,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:34,823 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:35,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:35,024 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 16:44:35,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:35,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271712591] [2020-10-15 16:44:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271712591] [2020-10-15 16:44:35,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159092241] [2020-10-15 16:44:35,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:35,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:35,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:35,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:35,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:35,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626644105] [2020-10-15 16:44:35,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:35,365 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 16:44:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:35,829 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 16:44:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:44:35,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:35,830 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:44:35,831 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:44:35,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:44:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:44:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 16:44:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 16:44:35,833 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 16:44:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:35,833 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 16:44:35,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 16:44:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:35,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:35,834 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:36,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:36,035 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 16:44:36,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:36,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469922951] [2020-10-15 16:44:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469922951] [2020-10-15 16:44:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137473902] [2020-10-15 16:44:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:36,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:36,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:36,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:36,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544664663] [2020-10-15 16:44:36,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:36,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:36,411 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 16:44:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:36,886 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 16:44:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:44:36,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:36,888 INFO L225 Difference]: With dead ends: 114 [2020-10-15 16:44:36,888 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 16:44:36,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:44:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 16:44:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 16:44:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 16:44:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 16:44:36,890 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 16:44:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:36,890 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 16:44:36,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 16:44:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:36,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:36,891 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:37,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:37,092 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 16:44:37,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:37,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870143977] [2020-10-15 16:44:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870143977] [2020-10-15 16:44:37,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500961925] [2020-10-15 16:44:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:37,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:37,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:37,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:37,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:37,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807885604] [2020-10-15 16:44:37,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:37,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:37,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:37,432 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 16:44:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:37,974 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 16:44:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:44:37,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:37,975 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:44:37,975 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:37,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:44:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 16:44:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:44:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 16:44:37,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 16:44:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:37,978 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 16:44:37,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 16:44:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:37,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:37,978 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:38,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:38,179 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 16:44:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:38,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445042612] [2020-10-15 16:44:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445042612] [2020-10-15 16:44:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976171184] [2020-10-15 16:44:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:38,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:38,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:38,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:38,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:38,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:38,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103393521] [2020-10-15 16:44:38,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:38,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:38,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:38,549 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 16:44:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:39,134 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 16:44:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:44:39,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:39,135 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:39,135 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:39,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:44:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 16:44:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 16:44:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 16:44:39,138 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 16:44:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:39,138 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 16:44:39,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 16:44:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:39,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:39,139 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:39,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:39,346 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 16:44:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:39,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641902931] [2020-10-15 16:44:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641902931] [2020-10-15 16:44:39,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196850119] [2020-10-15 16:44:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:39,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:39,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:39,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612246073] [2020-10-15 16:44:39,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:39,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:39,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:39,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:39,674 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 16:44:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:40,291 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 16:44:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:44:40,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:40,293 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:44:40,293 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:44:40,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:44:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:44:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 16:44:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 16:44:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 16:44:40,295 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 16:44:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:40,295 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 16:44:40,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 16:44:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:40,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:40,296 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:40,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:40,496 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 16:44:40,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:40,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017355047] [2020-10-15 16:44:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017355047] [2020-10-15 16:44:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694734238] [2020-10-15 16:44:40,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:40,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:40,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:40,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:40,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:40,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371717891] [2020-10-15 16:44:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:40,860 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 16:44:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:41,551 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 16:44:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:44:41,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:41,552 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:44:41,552 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:44:41,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:44:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:44:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 16:44:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:44:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 16:44:41,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 16:44:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 16:44:41,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 16:44:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:41,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:41,555 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:41,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:41,756 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 16:44:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109839429] [2020-10-15 16:44:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109839429] [2020-10-15 16:44:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821364290] [2020-10-15 16:44:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:42,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:42,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:42,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:42,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260990694] [2020-10-15 16:44:42,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:42,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:42,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:42,077 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 16:44:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:42,762 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 16:44:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:44:42,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:42,764 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:44:42,764 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:44:42,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:44:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:44:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 16:44:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:44:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 16:44:42,766 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 16:44:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:42,766 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 16:44:42,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 16:44:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:42,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:42,767 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:42,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:44:42,969 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 16:44:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:42,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682517177] [2020-10-15 16:44:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682517177] [2020-10-15 16:44:43,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979267563] [2020-10-15 16:44:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:43,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:43,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:43,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:43,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:43,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120092224] [2020-10-15 16:44:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:43,307 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 16:44:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:44,100 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 16:44:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:44:44,100 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:44,101 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:44:44,101 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:44:44,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:44:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:44:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 16:44:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:44:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 16:44:44,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 16:44:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:44,104 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 16:44:44,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 16:44:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:44,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:44,104 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:44,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:44:44,305 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 16:44:44,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:44,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378156063] [2020-10-15 16:44:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378156063] [2020-10-15 16:44:44,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812986229] [2020-10-15 16:44:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:44,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:44,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:44,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:44,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:44,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565836614] [2020-10-15 16:44:44,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:44,604 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 16:44:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:45,339 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 16:44:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:44:45,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:45,340 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:44:45,340 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 16:44:45,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:44:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 16:44:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 16:44:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:44:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 16:44:45,342 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 16:44:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:45,342 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 16:44:45,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 16:44:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:45,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:45,343 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:45,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:44:45,543 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 16:44:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643866110] [2020-10-15 16:44:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:45,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643866110] [2020-10-15 16:44:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389798353] [2020-10-15 16:44:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:45,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:45,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:45,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:45,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:45,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458654246] [2020-10-15 16:44:45,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:45,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:45,901 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 16:44:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:46,754 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 16:44:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:44:46,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:46,756 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:44:46,756 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:44:46,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:44:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:44:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 16:44:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:44:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 16:44:46,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 16:44:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:46,761 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 16:44:46,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 16:44:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:46,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:46,761 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:46,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:44:46,962 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 16:44:46,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:46,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023523039] [2020-10-15 16:44:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023523039] [2020-10-15 16:44:47,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166656649] [2020-10-15 16:44:47,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:47,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:47,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740895080] [2020-10-15 16:44:47,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:47,263 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 16:44:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:48,092 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:44:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:44:48,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:48,094 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:44:48,094 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:44:48,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:44:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:44:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 16:44:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:44:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 16:44:48,097 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 16:44:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:48,097 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 16:44:48,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 16:44:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:48,098 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:48,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:48,298 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 16:44:48,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:48,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377595591] [2020-10-15 16:44:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377595591] [2020-10-15 16:44:48,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753516273] [2020-10-15 16:44:48,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:48,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:48,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:48,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:48,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:48,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:48,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998727453] [2020-10-15 16:44:48,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:48,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:48,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:48,637 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 16:44:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:49,590 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 16:44:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:44:49,591 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:49,592 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:44:49,592 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:44:49,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:44:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:44:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 16:44:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:44:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 16:44:49,594 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 16:44:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:49,594 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 16:44:49,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 16:44:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:49,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:49,595 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:49,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:49,796 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 16:44:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:49,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479767424] [2020-10-15 16:44:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479767424] [2020-10-15 16:44:50,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97388413] [2020-10-15 16:44:50,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:50,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:50,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:50,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:50,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:50,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:50,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:50,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811437150] [2020-10-15 16:44:50,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:50,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:50,097 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 16:44:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:50,963 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 16:44:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:44:50,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:50,964 INFO L225 Difference]: With dead ends: 121 [2020-10-15 16:44:50,964 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 16:44:50,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:44:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 16:44:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 16:44:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:44:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 16:44:50,967 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 16:44:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:50,967 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 16:44:50,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 16:44:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:50,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:50,967 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:51,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 16:44:51,168 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 16:44:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:51,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425008496] [2020-10-15 16:44:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425008496] [2020-10-15 16:44:51,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756202424] [2020-10-15 16:44:51,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:51,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:44:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:51,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:51,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:51,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849608840] [2020-10-15 16:44:51,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:51,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:51,493 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 16:44:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:52,600 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 16:44:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:44:52,600 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:52,601 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:44:52,601 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:44:52,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:44:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:44:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 16:44:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:44:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 16:44:52,603 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 16:44:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:52,603 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 16:44:52,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 16:44:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:52,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:52,604 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:52,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:52,805 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 16:44:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:52,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229688441] [2020-10-15 16:44:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:53,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229688441] [2020-10-15 16:44:53,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940962197] [2020-10-15 16:44:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:53,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:44:53,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:53,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:53,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989540792] [2020-10-15 16:44:53,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:53,104 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 16:44:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:54,026 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 16:44:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:44:54,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:54,028 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:44:54,028 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:44:54,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:44:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:44:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 16:44:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:44:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 16:44:54,031 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 16:44:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:54,031 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 16:44:54,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 16:44:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:54,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:54,031 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:54,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:54,232 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 16:44:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:54,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735795079] [2020-10-15 16:44:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735795079] [2020-10-15 16:44:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223592835] [2020-10-15 16:44:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:54,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:44:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:54,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:54,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:54,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:54,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716798398] [2020-10-15 16:44:54,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:54,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:54,561 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 16:44:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:55,736 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 16:44:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:44:55,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:55,737 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:44:55,737 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:44:55,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:44:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:44:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 16:44:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:44:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 16:44:55,743 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 16:44:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:55,743 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 16:44:55,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 16:44:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:55,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:55,744 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:55,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:55,951 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:55,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 16:44:55,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:55,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701607254] [2020-10-15 16:44:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701607254] [2020-10-15 16:44:56,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83511907] [2020-10-15 16:44:56,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:56,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 16:44:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122896494] [2020-10-15 16:44:56,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 16:44:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 16:44:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:44:56,241 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 16:44:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:57,219 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 16:44:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:44:57,220 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 16:44:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:57,221 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:44:57,221 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:44:57,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:44:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:44:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 16:44:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:44:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 16:44:57,224 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 16:44:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:57,225 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 16:44:57,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 16:44:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 16:44:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 16:44:57,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:57,225 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:57,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:57,433 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 16:44:57,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:57,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083846456] [2020-10-15 16:44:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083846456] [2020-10-15 16:44:57,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973003390] [2020-10-15 16:44:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:57,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:44:57,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:57,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 16:44:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:57,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:44:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 16:44:57,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053652988] [2020-10-15 16:44:57,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:57,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:57,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:57,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:57,747 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 16:44:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:44:58,941 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 16:44:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:44:58,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 16:44:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:44:58,942 INFO L225 Difference]: With dead ends: 117 [2020-10-15 16:44:58,943 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:44:58,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:44:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:44:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 16:44:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:44:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 16:44:58,945 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 16:44:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:44:58,945 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 16:44:58,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:44:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 16:44:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:44:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:44:58,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:44:59,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:59,146 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:44:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:44:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 16:44:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:44:59,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473852299] [2020-10-15 16:44:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:44:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:44:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473852299] [2020-10-15 16:44:59,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079140318] [2020-10-15 16:44:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:44:59,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:44:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:44:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:44:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:44:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:44:59,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:44:59,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:44:59,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541350431] [2020-10-15 16:44:59,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:44:59,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:44:59,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:44:59,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:44:59,536 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 16:45:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:00,101 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 16:45:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:00,102 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:00,102 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:00,102 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:00,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:45:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 16:45:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:00,105 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:00,105 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:00,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:00,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:00,106 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:00,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 16:45:00,307 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 16:45:00,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:00,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955264841] [2020-10-15 16:45:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955264841] [2020-10-15 16:45:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022461032] [2020-10-15 16:45:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:00,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:00,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:00,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:00,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:00,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:00,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33924776] [2020-10-15 16:45:00,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:00,724 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:01,387 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 16:45:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:01,388 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:01,388 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:45:01,388 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:45:01,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:45:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 16:45:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:01,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:01,391 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:01,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:01,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:01,392 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:01,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:45:01,593 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 16:45:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:01,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530540319] [2020-10-15 16:45:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530540319] [2020-10-15 16:45:01,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928587652] [2020-10-15 16:45:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:01,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:01,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:01,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:01,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:01,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109323655] [2020-10-15 16:45:01,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:01,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:01,979 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:02,632 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 16:45:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:45:02,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:02,633 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:45:02,633 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:45:02,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:45:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:45:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 16:45:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:02,636 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:02,636 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:02,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:02,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:02,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:02,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:02,837 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 16:45:02,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182683742] [2020-10-15 16:45:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182683742] [2020-10-15 16:45:03,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609952856] [2020-10-15 16:45:03,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:03,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:03,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:03,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:03,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:03,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531397758] [2020-10-15 16:45:03,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:03,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:03,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:03,238 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:03,991 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 16:45:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:03,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:03,992 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:03,992 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:03,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 16:45:03,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 16:45:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:03,995 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:03,995 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:03,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:03,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:03,996 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:04,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 16:45:04,197 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 16:45:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:04,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636546390] [2020-10-15 16:45:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636546390] [2020-10-15 16:45:04,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997244822] [2020-10-15 16:45:04,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968930757] [2020-10-15 16:45:04,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:04,542 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:05,244 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 16:45:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:05,245 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:05,245 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:45:05,245 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:45:05,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:45:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 16:45:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:05,248 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:05,248 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:05,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:05,249 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:05,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,449 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 16:45:05,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:05,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41834105] [2020-10-15 16:45:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41834105] [2020-10-15 16:45:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834862138] [2020-10-15 16:45:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:05,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:05,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:05,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:05,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:05,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:05,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924508723] [2020-10-15 16:45:05,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:05,836 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:06,665 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 16:45:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:06,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:06,667 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:06,667 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:06,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 16:45:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:06,670 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:06,670 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:06,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:06,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:06,671 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:06,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:06,871 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 16:45:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:06,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374980791] [2020-10-15 16:45:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374980791] [2020-10-15 16:45:07,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199051884] [2020-10-15 16:45:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:07,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:07,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:07,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297487129] [2020-10-15 16:45:07,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:07,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:07,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:07,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:07,217 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:07,972 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 16:45:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:07,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:07,973 INFO L225 Difference]: With dead ends: 120 [2020-10-15 16:45:07,973 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 16:45:07,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 16:45:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 16:45:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:07,976 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:07,976 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:07,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:07,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:07,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:08,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:08,178 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 16:45:08,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:08,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346367213] [2020-10-15 16:45:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346367213] [2020-10-15 16:45:08,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782563581] [2020-10-15 16:45:08,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:08,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:08,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:08,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:08,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339299242] [2020-10-15 16:45:08,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:08,558 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:09,506 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 16:45:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:09,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:09,508 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:09,508 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:09,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:09,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 16:45:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:09,511 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:09,512 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:09,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:09,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:09,512 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:09,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:09,713 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 16:45:09,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:09,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916774298] [2020-10-15 16:45:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:09,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916774298] [2020-10-15 16:45:09,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737802161] [2020-10-15 16:45:09,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:10,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:10,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:10,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:10,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632448616] [2020-10-15 16:45:10,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:10,053 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:10,883 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 16:45:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:10,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:10,884 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:10,885 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 16:45:10,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 16:45:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 16:45:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:10,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:10,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:10,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:10,888 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:11,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 16:45:11,089 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 16:45:11,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:11,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904426] [2020-10-15 16:45:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904426] [2020-10-15 16:45:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695150105] [2020-10-15 16:45:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:11,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:11,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:11,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:11,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:11,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:11,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88312871] [2020-10-15 16:45:11,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:11,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:11,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:11,453 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:12,543 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 16:45:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:12,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:12,544 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:45:12,545 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 16:45:12,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 16:45:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 16:45:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:12,548 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:12,548 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:12,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:12,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:12,549 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:12,757 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 16:45:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:12,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717884830] [2020-10-15 16:45:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717884830] [2020-10-15 16:45:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635935339] [2020-10-15 16:45:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:13,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:13,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:13,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:13,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472638019] [2020-10-15 16:45:13,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:13,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:13,101 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:14,025 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 16:45:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:14,026 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:14,027 INFO L225 Difference]: With dead ends: 112 [2020-10-15 16:45:14,027 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 16:45:14,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 16:45:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 16:45:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:14,030 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:14,030 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:14,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:14,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:14,031 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:14,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 16:45:14,231 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 16:45:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:14,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042143121] [2020-10-15 16:45:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042143121] [2020-10-15 16:45:14,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947024195] [2020-10-15 16:45:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:14,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:14,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838030381] [2020-10-15 16:45:14,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:14,593 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:15,769 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 16:45:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:15,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:15,771 INFO L225 Difference]: With dead ends: 111 [2020-10-15 16:45:15,771 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:45:15,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:45:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 16:45:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:15,773 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:15,773 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:15,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:15,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:15,774 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:15,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:45:15,977 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 16:45:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111508421] [2020-10-15 16:45:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111508421] [2020-10-15 16:45:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595543079] [2020-10-15 16:45:16,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:16,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:16,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:16,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:16,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:16,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590177566] [2020-10-15 16:45:16,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:16,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:16,321 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:17,300 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 16:45:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:17,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:17,301 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:45:17,301 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 16:45:17,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 16:45:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 16:45:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:17,304 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:17,304 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:17,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:17,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:17,305 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:17,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:17,512 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 16:45:17,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176021385] [2020-10-15 16:45:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176021385] [2020-10-15 16:45:17,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339866262] [2020-10-15 16:45:17,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:17,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:17,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:17,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:17,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208147490] [2020-10-15 16:45:17,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:17,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:17,859 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:19,138 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 16:45:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:19,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:19,140 INFO L225 Difference]: With dead ends: 107 [2020-10-15 16:45:19,140 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 16:45:19,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 16:45:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 16:45:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:19,142 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:19,143 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:19,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:19,346 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 16:45:19,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:19,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471659661] [2020-10-15 16:45:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471659661] [2020-10-15 16:45:19,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983450019] [2020-10-15 16:45:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:19,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 16:45:19,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:19,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:19,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529528532] [2020-10-15 16:45:19,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:19,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:19,686 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:20,767 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 16:45:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:20,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:20,768 INFO L225 Difference]: With dead ends: 104 [2020-10-15 16:45:20,769 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:45:20,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:45:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 16:45:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:20,771 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 16:45:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:20,771 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:20,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:20,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:20,772 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:20,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:20,972 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 16:45:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:20,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876333291] [2020-10-15 16:45:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876333291] [2020-10-15 16:45:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959809752] [2020-10-15 16:45:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:21,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 16:45:21,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:21,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:21,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:21,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:21,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894847926] [2020-10-15 16:45:21,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:21,348 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 16:45:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:22,730 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 16:45:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:22,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:22,732 INFO L225 Difference]: With dead ends: 103 [2020-10-15 16:45:22,732 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 16:45:22,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 16:45:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 16:45:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:22,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 16:45:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:22,735 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:22,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:22,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:22,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:22,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 16:45:22,943 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 16:45:22,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:22,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016537786] [2020-10-15 16:45:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:23,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016537786] [2020-10-15 16:45:23,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410701758] [2020-10-15 16:45:23,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:23,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:23,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 16:45:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382568539] [2020-10-15 16:45:23,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 16:45:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 16:45:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:45:23,281 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 16:45:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:24,406 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 16:45:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:24,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 16:45:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:24,408 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:45:24,408 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:45:24,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:45:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 16:45:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 16:45:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 16:45:24,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 16:45:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:24,411 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 16:45:24,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 16:45:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 16:45:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:24,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:24,411 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:24,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:24,612 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 16:45:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:24,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394366905] [2020-10-15 16:45:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394366905] [2020-10-15 16:45:24,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331326789] [2020-10-15 16:45:24,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:24,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:24,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:24,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:24,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:24,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049211457] [2020-10-15 16:45:24,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:24,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:24,971 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 16:45:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:26,418 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 16:45:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:45:26,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:26,420 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:45:26,420 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 16:45:26,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 16:45:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 16:45:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 16:45:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 16:45:26,422 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 16:45:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:26,422 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 16:45:26,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 16:45:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 16:45:26,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:26,423 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:26,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:26,623 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 16:45:26,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:26,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785388302] [2020-10-15 16:45:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:26,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785388302] [2020-10-15 16:45:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635562320] [2020-10-15 16:45:26,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:26,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 16:45:26,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 16:45:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:26,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:27,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:27,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 16:45:27,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340357189] [2020-10-15 16:45:27,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:27,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:27,007 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 16:45:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:28,371 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 16:45:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:28,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 16:45:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:28,373 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:45:28,373 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:45:28,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:45:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 16:45:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:45:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:45:28,376 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 16:45:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:28,376 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:45:28,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:45:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:28,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:28,376 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:28,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:28,577 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 16:45:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:28,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442693339] [2020-10-15 16:45:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442693339] [2020-10-15 16:45:28,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169325048] [2020-10-15 16:45:28,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:28,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:28,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:28,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:45:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:28,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:28,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:28,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330467899] [2020-10-15 16:45:28,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:28,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:28,988 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 16:45:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:30,443 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 16:45:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:30,444 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:30,445 INFO L225 Difference]: With dead ends: 96 [2020-10-15 16:45:30,445 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 16:45:30,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:45:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 16:45:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 16:45:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:45:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 16:45:30,448 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 16:45:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:30,448 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 16:45:30,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 16:45:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:30,449 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:30,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:30,657 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:30,658 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 16:45:30,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:30,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365401252] [2020-10-15 16:45:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:31,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365401252] [2020-10-15 16:45:31,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761021531] [2020-10-15 16:45:31,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:31,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:31,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:31,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:31,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:31,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:31,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654056198] [2020-10-15 16:45:31,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:31,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:31,091 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 16:45:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:31,679 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 16:45:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:45:31,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:31,680 INFO L225 Difference]: With dead ends: 102 [2020-10-15 16:45:31,680 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:45:31,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:45:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:45:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 16:45:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 16:45:31,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 16:45:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:31,683 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 16:45:31,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 16:45:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:31,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:31,683 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:31,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 16:45:31,884 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 16:45:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:31,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845988920] [2020-10-15 16:45:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:32,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845988920] [2020-10-15 16:45:32,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77788468] [2020-10-15 16:45:32,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:32,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:32,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:32,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:32,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729655848] [2020-10-15 16:45:32,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:32,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:32,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:32,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:32,360 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 16:45:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:33,048 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 16:45:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:45:33,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:33,049 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:45:33,049 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:45:33,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:45:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:45:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 16:45:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 16:45:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 16:45:33,052 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 16:45:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:33,052 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 16:45:33,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 16:45:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:33,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:33,052 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:33,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:45:33,253 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 16:45:33,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:33,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289594527] [2020-10-15 16:45:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289594527] [2020-10-15 16:45:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280319341] [2020-10-15 16:45:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:33,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:33,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146215593] [2020-10-15 16:45:33,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:33,674 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 16:45:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:34,376 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 16:45:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:45:34,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:34,378 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:45:34,378 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:45:34,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:45:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:45:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 16:45:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 16:45:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 16:45:34,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 16:45:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:34,380 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 16:45:34,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 16:45:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:34,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:34,381 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:34,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:45:34,582 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 16:45:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:34,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089502310] [2020-10-15 16:45:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089502310] [2020-10-15 16:45:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632658380] [2020-10-15 16:45:34,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:34,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:34,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:34,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:35,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:35,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:35,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:35,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068639070] [2020-10-15 16:45:35,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:35,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:35,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:35,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:35,036 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 16:45:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:35,805 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 16:45:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:45:35,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:35,807 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:35,807 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:35,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 16:45:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 16:45:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:45:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 16:45:35,810 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 16:45:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:35,810 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 16:45:35,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 16:45:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:35,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:35,811 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:36,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:45:36,018 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 16:45:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:36,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468273892] [2020-10-15 16:45:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468273892] [2020-10-15 16:45:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334916639] [2020-10-15 16:45:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:36,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219905901] [2020-10-15 16:45:36,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:36,438 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 16:45:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:37,216 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 16:45:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:45:37,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:37,218 INFO L225 Difference]: With dead ends: 139 [2020-10-15 16:45:37,218 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 16:45:37,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 16:45:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 16:45:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 16:45:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:45:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 16:45:37,221 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 16:45:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:37,221 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 16:45:37,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 16:45:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:37,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:37,221 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:37,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:37,422 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 16:45:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:37,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310423773] [2020-10-15 16:45:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310423773] [2020-10-15 16:45:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245950488] [2020-10-15 16:45:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:37,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:37,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:37,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:37,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481408019] [2020-10-15 16:45:37,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:37,873 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 16:45:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:38,757 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 16:45:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:45:38,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:38,758 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:45:38,758 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:45:38,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 16:45:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:45:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 16:45:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:45:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 16:45:38,761 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 16:45:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:38,761 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 16:45:38,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 16:45:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:38,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:38,762 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:38,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:45:38,963 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:38,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 16:45:38,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:38,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768259321] [2020-10-15 16:45:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:39,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768259321] [2020-10-15 16:45:39,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321672730] [2020-10-15 16:45:39,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:39,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:39,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:39,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503223545] [2020-10-15 16:45:39,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:39,367 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 16:45:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:40,236 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 16:45:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:45:40,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:40,238 INFO L225 Difference]: With dead ends: 137 [2020-10-15 16:45:40,238 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:45:40,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 16:45:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:45:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 16:45:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:45:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 16:45:40,241 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 16:45:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:40,242 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 16:45:40,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 16:45:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:40,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:40,242 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:40,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:40,443 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 16:45:40,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:40,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305103171] [2020-10-15 16:45:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305103171] [2020-10-15 16:45:40,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665773412] [2020-10-15 16:45:40,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:40,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:40,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:40,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:40,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:40,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:40,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113904413] [2020-10-15 16:45:40,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:40,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:40,897 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 16:45:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:41,893 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 16:45:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:45:41,894 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:41,895 INFO L225 Difference]: With dead ends: 134 [2020-10-15 16:45:41,895 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:45:41,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 16:45:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:45:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 16:45:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 16:45:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 16:45:41,898 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 16:45:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:41,898 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 16:45:41,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 16:45:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:41,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:41,898 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:42,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 16:45:42,099 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 16:45:42,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:42,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289652202] [2020-10-15 16:45:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289652202] [2020-10-15 16:45:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864618145] [2020-10-15 16:45:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:42,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:42,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516528430] [2020-10-15 16:45:42,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:42,508 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 16:45:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:43,452 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 16:45:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 16:45:43,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:43,453 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:45:43,453 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:45:43,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 16:45:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:45:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 16:45:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 16:45:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 16:45:43,455 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 16:45:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:43,455 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 16:45:43,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 16:45:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:43,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:43,456 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:43,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:43,657 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 16:45:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:43,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335376181] [2020-10-15 16:45:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335376181] [2020-10-15 16:45:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070368620] [2020-10-15 16:45:43,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:44,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:44,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:44,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:44,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855184553] [2020-10-15 16:45:44,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:44,077 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 16:45:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:45,223 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 16:45:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:45:45,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:45,225 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:45:45,225 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:45:45,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 16:45:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:45:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 16:45:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 16:45:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 16:45:45,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 16:45:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:45,228 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 16:45:45,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 16:45:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:45,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:45,228 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:45,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:45,429 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 16:45:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:45,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730873612] [2020-10-15 16:45:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730873612] [2020-10-15 16:45:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099330227] [2020-10-15 16:45:45,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:45,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:45,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:45,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:45,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:45,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:45,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542117985] [2020-10-15 16:45:45,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:45,827 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 16:45:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:46,818 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 16:45:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 16:45:46,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:46,820 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:45:46,820 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 16:45:46,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 16:45:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 16:45:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 16:45:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:45:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 16:45:46,823 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 16:45:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:46,823 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 16:45:46,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 16:45:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:46,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:46,824 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:47,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:47,025 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 16:45:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:47,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284216489] [2020-10-15 16:45:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:47,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284216489] [2020-10-15 16:45:47,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346379775] [2020-10-15 16:45:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:47,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:47,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:47,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887464760] [2020-10-15 16:45:47,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:47,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:47,445 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 16:45:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:48,643 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 16:45:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:45:48,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:48,644 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:45:48,645 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 16:45:48,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 16:45:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 16:45:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 16:45:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:45:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 16:45:48,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 16:45:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:48,647 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 16:45:48,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 16:45:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:48,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:48,648 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:48,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:48,849 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 16:45:48,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:48,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965439740] [2020-10-15 16:45:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965439740] [2020-10-15 16:45:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525328498] [2020-10-15 16:45:49,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:49,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:45:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:49,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:49,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46922777] [2020-10-15 16:45:49,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:49,239 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 16:45:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:50,312 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 16:45:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 16:45:50,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:50,313 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:45:50,313 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:45:50,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 16:45:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:45:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 16:45:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 16:45:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 16:45:50,316 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 16:45:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:50,316 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 16:45:50,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 16:45:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:50,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:50,317 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:50,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:45:50,518 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 16:45:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:50,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875664260] [2020-10-15 16:45:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875664260] [2020-10-15 16:45:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659744545] [2020-10-15 16:45:50,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:50,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:45:50,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:50,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:50,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:50,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:50,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570825271] [2020-10-15 16:45:50,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:50,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:50,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:50,919 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 16:45:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:52,243 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 16:45:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 16:45:52,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:52,244 INFO L225 Difference]: With dead ends: 128 [2020-10-15 16:45:52,244 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 16:45:52,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 16:45:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 16:45:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 16:45:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 16:45:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 16:45:52,246 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 16:45:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:52,246 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 16:45:52,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 16:45:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:52,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:52,247 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:52,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 16:45:52,447 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 16:45:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403353105] [2020-10-15 16:45:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403353105] [2020-10-15 16:45:52,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101743537] [2020-10-15 16:45:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:52,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:52,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:52,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239947379] [2020-10-15 16:45:52,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:52,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:52,830 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 16:45:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:53,997 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 16:45:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 16:45:53,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:53,998 INFO L225 Difference]: With dead ends: 129 [2020-10-15 16:45:53,998 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 16:45:53,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 16:45:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 16:45:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 16:45:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 16:45:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 16:45:54,000 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 16:45:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:54,001 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 16:45:54,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 16:45:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:54,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:54,001 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:45:54,205 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 16:45:54,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:54,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050671129] [2020-10-15 16:45:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050671129] [2020-10-15 16:45:54,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507539912] [2020-10-15 16:45:54,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:54,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:45:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:54,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:54,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:54,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:54,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95782585] [2020-10-15 16:45:54,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:54,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:54,623 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 16:45:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:56,065 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 16:45:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 16:45:56,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:45:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:56,067 INFO L225 Difference]: With dead ends: 126 [2020-10-15 16:45:56,067 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:45:56,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 16:45:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:45:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 16:45:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 16:45:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 16:45:56,070 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 16:45:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:56,070 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 16:45:56,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:45:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 16:45:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:56,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:56,070 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:56,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:45:56,271 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 16:45:56,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:56,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967035377] [2020-10-15 16:45:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967035377] [2020-10-15 16:45:56,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232479953] [2020-10-15 16:45:56,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:56,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 16:45:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:56,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:56,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:45:56,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009750058] [2020-10-15 16:45:56,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:45:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:45:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:45:56,645 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 16:45:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:45:57,920 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 16:45:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 16:45:57,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:45:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:45:57,922 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:45:57,922 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:45:57,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 16:45:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:45:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 16:45:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 16:45:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 16:45:57,925 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 16:45:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:45:57,925 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 16:45:57,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:45:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 16:45:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:45:57,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:45:57,925 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:45:58,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:58,126 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:45:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:45:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 16:45:58,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:45:58,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600701626] [2020-10-15 16:45:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:45:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:45:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:58,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600701626] [2020-10-15 16:45:58,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091227536] [2020-10-15 16:45:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:45:58,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:45:58,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:45:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:45:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:45:58,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:45:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:45:58,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:45:58,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:45:58,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297532439] [2020-10-15 16:45:58,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:45:58,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:45:58,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:45:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:45:58,537 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 16:46:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:00,170 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 16:46:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 16:46:00,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:00,172 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:46:00,172 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:46:00,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 16:46:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:46:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 16:46:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:46:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 16:46:00,175 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 16:46:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:00,175 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 16:46:00,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 16:46:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:00,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:00,176 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:00,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:46:00,377 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 16:46:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:00,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330096761] [2020-10-15 16:46:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330096761] [2020-10-15 16:46:00,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957111248] [2020-10-15 16:46:00,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:00,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 16:46:00,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:00,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:00,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 16:46:00,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2730913] [2020-10-15 16:46:00,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 16:46:00,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 16:46:00,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:46:00,785 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 16:46:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:02,131 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 16:46:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 16:46:02,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 16:46:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:02,132 INFO L225 Difference]: With dead ends: 144 [2020-10-15 16:46:02,133 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:46:02,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 16:46:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:46:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 16:46:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:46:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 16:46:02,136 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 16:46:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:02,136 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 16:46:02,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 16:46:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 16:46:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 16:46:02,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:02,137 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:02,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:02,346 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 16:46:02,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:02,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408995857] [2020-10-15 16:46:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:46:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:02,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408995857] [2020-10-15 16:46:02,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704089150] [2020-10-15 16:46:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:46:02,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 16:46:02,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:46:02,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 16:46:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:46:02,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:46:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:46:02,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:46:02,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 16:46:02,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629322790] [2020-10-15 16:46:02,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 16:46:02,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:46:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 16:46:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:46:02,776 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 16:46:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:46:04,412 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 16:46:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 16:46:04,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 16:46:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:46:04,414 INFO L225 Difference]: With dead ends: 125 [2020-10-15 16:46:04,414 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:46:04,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 16:46:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:46:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 16:46:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:46:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 16:46:04,416 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 16:46:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:46:04,417 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 16:46:04,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 16:46:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 16:46:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 16:46:04,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:46:04,417 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:46:04,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 16:46:04,618 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:46:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:46:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 16:46:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:46:04,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259575995] [2020-10-15 16:46:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:46:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 16:46:04,628 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 16:46:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 16:46:04,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 16:46:04,668 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 16:46:04,668 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 16:46:04,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-15 16:46:04,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:46:04 BasicIcfg [2020-10-15 16:46:04,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:46:04,738 INFO L168 Benchmark]: Toolchain (without parser) took 230772.69 ms. Allocated memory was 251.1 MB in the beginning and 272.6 MB in the end (delta: 21.5 MB). Free memory was 207.8 MB in the beginning and 184.5 MB in the end (delta: 23.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:04,739 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:46:04,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 786.60 ms. Allocated memory was 251.1 MB in the beginning and 313.0 MB in the end (delta: 61.9 MB). Free memory was 207.8 MB in the beginning and 268.9 MB in the end (delta: -61.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:04,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.10 ms. Allocated memory is still 313.0 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:46:04,740 INFO L168 Benchmark]: Boogie Preprocessor took 28.73 ms. Allocated memory is still 313.0 MB. Free memory was 268.9 MB in the beginning and 266.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:04,740 INFO L168 Benchmark]: RCFGBuilder took 367.11 ms. Allocated memory is still 313.0 MB. Free memory was 266.4 MB in the beginning and 244.2 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:04,741 INFO L168 Benchmark]: TraceAbstraction took 229528.69 ms. Allocated memory was 313.0 MB in the beginning and 272.6 MB in the end (delta: -40.4 MB). Free memory was 244.2 MB in the beginning and 184.5 MB in the end (delta: 59.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:46:04,743 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 786.60 ms. Allocated memory was 251.1 MB in the beginning and 313.0 MB in the end (delta: 61.9 MB). Free memory was 207.8 MB in the beginning and 268.9 MB in the end (delta: -61.2 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 50.10 ms. Allocated memory is still 313.0 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.73 ms. Allocated memory is still 313.0 MB. Free memory was 268.9 MB in the beginning and 266.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 367.11 ms. Allocated memory is still 313.0 MB. Free memory was 266.4 MB in the beginning and 244.2 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 14.2 GB. * TraceAbstraction took 229528.69 ms. Allocated memory was 313.0 MB in the beginning and 272.6 MB in the end (delta: -40.4 MB). Free memory was 244.2 MB in the beginning and 184.5 MB in the end (delta: 59.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 229.3s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 127.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12305 SDslu, 22147 SDs, 0 SdLazy, 24060 SolverSat, 13833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11878 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75950 ImplicationChecksByTransitivity, 130.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 218 MinimizatonAttempts, 5507 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 42.6s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...