/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/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:13:28,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:13:28,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:13:28,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:13:28,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:13:28,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:13:28,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:13:28,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:13:28,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:13:28,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:13:28,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:13:28,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:13:28,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:13:28,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:13:28,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:13:28,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:13:28,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:13:28,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:13:28,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:13:28,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:13:28,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:13:28,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:13:28,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:13:28,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:13:28,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 16:13:28,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:13:28,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:13:28,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:13:28,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:13:28,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:13:28,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:13:28,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:13:28,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:13:28,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:13:28,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:13:28,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:13:28,632 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 16:13:28,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:13:28,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:13:28,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:13:28,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:13:28,681 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:13:28,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:13:28,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:13:28,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:13:28,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:13:28,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:13:28,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:13:28,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:13:28,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:13:28,683 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:13:28,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:13:28,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:13:28,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:13:28,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:13:28,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:13:28,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:13:28,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:13:28,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:28,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:13:28,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:13:28,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:13:28,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:13:28,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:13:28,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:13:28,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:13:28,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:13:28,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:13:29,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:13:29,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:13:29,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:13:29,016 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:13:29,017 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-15 16:13:29,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f843ad750/28202d30a6a34aeca516b936eec89d7f/FLAGd24b54a90 [2020-10-15 16:13:29,594 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:13:29,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-15 16:13:29,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f843ad750/28202d30a6a34aeca516b936eec89d7f/FLAGd24b54a90 [2020-10-15 16:13:29,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f843ad750/28202d30a6a34aeca516b936eec89d7f [2020-10-15 16:13:29,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:13:29,960 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:13:29,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:29,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:13:29,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:13:29,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:29" (1/1) ... [2020-10-15 16:13:29,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d79b1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:29, skipping insertion in model container [2020-10-15 16:13:29,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:29" (1/1) ... [2020-10-15 16:13:29,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:13:30,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:13:30,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:30,510 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:13:30,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:30,652 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:13:30,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30 WrapperNode [2020-10-15 16:13:30,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:30,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:30,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:13:30,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:13:30,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:30,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:13:30,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:13:30,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:13:30,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:13:30,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:13:30,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:13:30,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:13:30,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (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 16:13:30,792 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:13:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:13:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:13:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:13:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:13:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:13:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:13:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:13:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:13:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:13:30,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:13:30,797 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 16:13:31,139 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:13:31,140 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:13:31,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:31 BoogieIcfgContainer [2020-10-15 16:13:31,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:13:31,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:13:31,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:13:31,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:13:31,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:13:29" (1/3) ... [2020-10-15 16:13:31,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c68aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:31, skipping insertion in model container [2020-10-15 16:13:31,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (2/3) ... [2020-10-15 16:13:31,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c68aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:31, skipping insertion in model container [2020-10-15 16:13:31,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:31" (3/3) ... [2020-10-15 16:13:31,150 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-15 16:13:31,161 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:13:31,161 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:13:31,168 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:13:31,170 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:13:31,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,198 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,198 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,198 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,199 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,200 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,200 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,201 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,201 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,201 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,203 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,204 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,204 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,204 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,208 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,208 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,209 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,209 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,217 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,217 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,217 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,217 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,218 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,218 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:31,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:13:31,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:13:31,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:13:31,257 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:13:31,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:13:31,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:13:31,257 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:13:31,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:13:31,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:13:31,270 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:13:31,272 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:31,274 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:31,276 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:31,312 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 16:13:31,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:13:31,318 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 16:13:31,321 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 16:13:32,371 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 16:13:32,477 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-15 16:13:32,477 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 16:13:32,484 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:13:32,497 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:13:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:13:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:13:32,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-15 16:13:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556091672] [2020-10-15 16:13:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,759 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 16:13:32,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556091672] [2020-10-15 16:13:32,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:32,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:13:32,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938261688] [2020-10-15 16:13:32,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:13:32,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:13:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:13:32,787 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:13:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,863 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 16:13:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:32,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:13:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,877 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:13:32,877 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:13:32,878 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 16:13:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:13:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 16:13:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:13:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 16:13:32,915 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 16:13:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,915 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 16:13:32,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:13:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 16:13:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:32,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:13:32,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-15 16:13:32,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228836452] [2020-10-15 16:13:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,010 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 16:13:33,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228836452] [2020-10-15 16:13:33,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:33,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156549192] [2020-10-15 16:13:33,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:33,014 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 16:13:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,064 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 16:13:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:33,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,066 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:13:33,067 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:13:33,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:13:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 16:13:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:13:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 16:13:33,078 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 16:13:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,079 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 16:13:33,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 16:13:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:33,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:13:33,081 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-15 16:13:33,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044123722] [2020-10-15 16:13:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,180 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 16:13:33,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044123722] [2020-10-15 16:13:33,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:33,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:33,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131062922] [2020-10-15 16:13:33,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:33,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:33,182 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 16:13:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,208 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 16:13:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:33,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,210 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:13:33,210 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:13:33,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:13:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 16:13:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:13:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 16:13:33,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 16:13:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,221 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 16:13:33,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 16:13:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:13:33,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-15 16:13:33,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935355608] [2020-10-15 16:13:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,288 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 16:13:33,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935355608] [2020-10-15 16:13:33,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:33,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516836221] [2020-10-15 16:13:33,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:33,291 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 16:13:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,351 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 16:13:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:33,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,353 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:13:33,353 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:13:33,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:13:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 16:13:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:13:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 16:13:33,363 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 16:13:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,363 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 16:13:33,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 16:13:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:33,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,365 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:13:33,366 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-15 16:13:33,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561138561] [2020-10-15 16:13:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,475 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 16:13:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561138561] [2020-10-15 16:13:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894261722] [2020-10-15 16:13:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:33,633 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 16:13:33,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 16:13:33,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013527012] [2020-10-15 16:13:33,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:13:33,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:13:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:33,635 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 16:13:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,710 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 16:13:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:33,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 16:13:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,712 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:13:33,712 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:13:33,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:13:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 16:13:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:13:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 16:13:33,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 16:13:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,721 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 16:13:33,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:13:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 16:13:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:33,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,723 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-15 16:13:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026639513] [2020-10-15 16:13:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,033 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 16:13:34,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026639513] [2020-10-15 16:13:34,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578023234] [2020-10-15 16:13:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,149 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 16:13:34,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798934678] [2020-10-15 16:13:34,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:34,152 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 16:13:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,188 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:13:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:34,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,190 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:13:34,190 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:13:34,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:13:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 16:13:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:13:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 16:13:34,209 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 16:13:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,210 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 16:13:34,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 16:13:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:34,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,427 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-15 16:13:34,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624767754] [2020-10-15 16:13:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,483 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 16:13:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624767754] [2020-10-15 16:13:34,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558676091] [2020-10-15 16:13:34,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:34,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,582 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 16:13:34,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:34,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090431871] [2020-10-15 16:13:34,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:34,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:34,584 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 16:13:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,632 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 16:13:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:34,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,634 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:13:34,634 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:13:34,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:13:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 16:13:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:13:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 16:13:34,642 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 16:13:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,643 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 16:13:34,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 16:13:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:34,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,644 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-15 16:13:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926010712] [2020-10-15 16:13:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,913 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 16:13:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926010712] [2020-10-15 16:13:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598328208] [2020-10-15 16:13:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:35,037 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 16:13:35,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:35,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170728213] [2020-10-15 16:13:35,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:35,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:35,039 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 16:13:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,123 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:13:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:35,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,124 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:13:35,124 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:13:35,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:13:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 16:13:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:13:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 16:13:35,131 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 16:13:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,132 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 16:13:35,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 16:13:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,348 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-15 16:13:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853449124] [2020-10-15 16:13:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853449124] [2020-10-15 16:13:35,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158669405] [2020-10-15 16:13:35,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,409 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 16:13:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,437 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 16:13:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:35,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,439 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:13:35,439 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:13:35,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:13:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 16:13:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:13:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 16:13:35,447 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 16:13:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,447 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 16:13:35,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 16:13:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 16:13:35,449 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-15 16:13:35,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228156090] [2020-10-15 16:13:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,561 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 16:13:35,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228156090] [2020-10-15 16:13:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455362460] [2020-10-15 16:13:35,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,564 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 16:13:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,610 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 16:13:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:35,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,611 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:13:35,611 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:13:35,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:13:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 16:13:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:13:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 16:13:35,626 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 16:13:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,629 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 16:13:35,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 16:13:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 16:13:35,631 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-15 16:13:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834254001] [2020-10-15 16:13:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,708 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 16:13:35,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834254001] [2020-10-15 16:13:35,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262808900] [2020-10-15 16:13:35,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,712 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 16:13:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,778 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:35,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,780 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:35,780 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:35,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 16:13:35,789 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 16:13:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,789 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 16:13:35,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 16:13:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 16:13:35,792 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-15 16:13:35,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036231532] [2020-10-15 16:13:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,863 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 16:13:35,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036231532] [2020-10-15 16:13:35,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556450340] [2020-10-15 16:13:35,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,865 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 16:13:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,939 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:35,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,940 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:35,940 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:35,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 16:13:35,944 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 16:13:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 16:13:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 16:13:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,946 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 16:13:35,946 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-15 16:13:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439522718] [2020-10-15 16:13:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439522718] [2020-10-15 16:13:36,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993477012] [2020-10-15 16:13:36,039 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 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 16:13:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 16:13:36,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391780619] [2020-10-15 16:13:36,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:36,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:36,171 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 16:13:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,267 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 16:13:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:36,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 16:13:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,269 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:36,269 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:36,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 16:13:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:13:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 16:13:36,273 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 16:13:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,274 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 16:13:36,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 16:13:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:36,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,274 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:13:36,485 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-15 16:13:36,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386161666] [2020-10-15 16:13:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386161666] [2020-10-15 16:13:36,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731744165] [2020-10-15 16:13:36,560 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 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 16:13:36,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238109232] [2020-10-15 16:13:36,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,693 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 16:13:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,727 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:13:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:36,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,729 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:13:36,729 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:13:36,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:13:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 16:13:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:13:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 16:13:36,734 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 16:13:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,734 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 16:13:36,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 16:13:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,735 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,947 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-15 16:13:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857719406] [2020-10-15 16:13:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857719406] [2020-10-15 16:13:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578983368] [2020-10-15 16:13:37,022 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 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 16:13:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404085039] [2020-10-15 16:13:37,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,167 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 16:13:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,237 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 16:13:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:37,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,240 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:13:37,240 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:13:37,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:13:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 16:13:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:13:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 16:13:37,246 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 16:13:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,246 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 16:13:37,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 16:13:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:37,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,247 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:13:37,458 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-15 16:13:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114612260] [2020-10-15 16:13:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114612260] [2020-10-15 16:13:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882583103] [2020-10-15 16:13:37,543 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 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 16:13:37,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130328729] [2020-10-15 16:13:37,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,664 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 16:13:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,755 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 16:13:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:37,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,759 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:13:37,759 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:13:37,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:13:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 16:13:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 16:13:37,764 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 16:13:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,764 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 16:13:37,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 16:13:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:37,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,765 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:13:37,975 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-15 16:13:37,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322565424] [2020-10-15 16:13:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322565424] [2020-10-15 16:13:38,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153268121] [2020-10-15 16:13:38,027 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 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 16:13:38,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55891762] [2020-10-15 16:13:38,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,150 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 16:13:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,276 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 16:13:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:38,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,278 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:13:38,278 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:13:38,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:13:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 16:13:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 16:13:38,284 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 16:13:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,284 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 16:13:38,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 16:13:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,285 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:13:38,495 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-15 16:13:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170265828] [2020-10-15 16:13:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,582 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 16:13:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170265828] [2020-10-15 16:13:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968210625] [2020-10-15 16:13:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,711 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 16:13:38,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986564037] [2020-10-15 16:13:38,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,713 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 16:13:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,752 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 16:13:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:38,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,753 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:13:38,753 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:13:38,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:13:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 16:13:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:13:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 16:13:38,757 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 16:13:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,758 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 16:13:38,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 16:13:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,759 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:13:38,969 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-15 16:13:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635805811] [2020-10-15 16:13:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,026 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 16:13:39,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635805811] [2020-10-15 16:13:39,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937774026] [2020-10-15 16:13:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:39,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,152 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 16:13:39,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025155931] [2020-10-15 16:13:39,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:39,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:39,155 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 16:13:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,228 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 16:13:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,229 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,230 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:13:39,231 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:13:39,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:13:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 16:13:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:13:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 16:13:39,236 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 16:13:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,236 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 16:13:39,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 16:13:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,237 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,449 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-15 16:13:39,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471099026] [2020-10-15 16:13:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,521 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 16:13:39,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471099026] [2020-10-15 16:13:39,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83834640] [2020-10-15 16:13:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,637 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 16:13:39,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664301809] [2020-10-15 16:13:39,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:39,639 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 16:13:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,720 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 16:13:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,724 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:13:39,724 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:39,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:13:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 16:13:39,728 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 16:13:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,728 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 16:13:39,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 16:13:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,729 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,933 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-15 16:13:39,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135580021] [2020-10-15 16:13:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,010 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 16:13:40,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135580021] [2020-10-15 16:13:40,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677618400] [2020-10-15 16:13:40,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:40,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:40,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55947728] [2020-10-15 16:13:40,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:40,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:40,172 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 16:13:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,233 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 16:13:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:40,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,234 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:40,234 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:13:40,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:13:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 16:13:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:13:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 16:13:40,239 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 16:13:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,240 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 16:13:40,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 16:13:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,242 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 16:13:40,452 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-15 16:13:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613310439] [2020-10-15 16:13:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,511 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 16:13:40,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613310439] [2020-10-15 16:13:40,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194720009] [2020-10-15 16:13:40,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,634 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 16:13:40,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505787281] [2020-10-15 16:13:40,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:40,635 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,730 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 16:13:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:40,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,732 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:40,732 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:40,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 16:13:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 16:13:40,736 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 16:13:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,736 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 16:13:40,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 16:13:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,737 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,946 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-15 16:13:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646113990] [2020-10-15 16:13:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,005 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 16:13:41,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646113990] [2020-10-15 16:13:41,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110626482] [2020-10-15 16:13:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,122 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 16:13:41,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:41,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373784211] [2020-10-15 16:13:41,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:41,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:41,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:41,124 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 16:13:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,194 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:13:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:41,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,196 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:41,196 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:41,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 16:13:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:13:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 16:13:41,200 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 16:13:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,200 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 16:13:41,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 16:13:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,203 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:13:41,412 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-15 16:13:41,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366788300] [2020-10-15 16:13:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,499 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 16:13:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366788300] [2020-10-15 16:13:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084464669] [2020-10-15 16:13:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:41,656 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 16:13:41,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:41,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086434501] [2020-10-15 16:13:41,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:41,658 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 16:13:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,816 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 16:13:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:41,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,817 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:13:41,818 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:41,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 16:13:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:13:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 16:13:41,823 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 16:13:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,823 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 16:13:41,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 16:13:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,029 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-15 16:13:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173356550] [2020-10-15 16:13:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,096 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 16:13:42,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173356550] [2020-10-15 16:13:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698195646] [2020-10-15 16:13:42,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,248 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 16:13:42,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163826015] [2020-10-15 16:13:42,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:42,250 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,364 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 16:13:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:42,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,365 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:13:42,365 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:13:42,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:13:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 16:13:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:42,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:42,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,371 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:13:42,572 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-15 16:13:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307255953] [2020-10-15 16:13:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,621 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 16:13:42,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307255953] [2020-10-15 16:13:42,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647266176] [2020-10-15 16:13:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:42,727 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 16:13:42,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:42,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386222773] [2020-10-15 16:13:42,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:42,729 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,937 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 16:13:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:42,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,940 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:42,940 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:42,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 16:13:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:42,945 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,945 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:42,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:42,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:13:43,157 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-15 16:13:43,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705942022] [2020-10-15 16:13:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,217 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 16:13:43,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705942022] [2020-10-15 16:13:43,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709384408] [2020-10-15 16:13:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:43,334 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 16:13:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463558324] [2020-10-15 16:13:43,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:43,336 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,496 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 16:13:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:43,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,497 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:13:43,498 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:13:43,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:13:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 16:13:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 16:13:43,502 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 16:13:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 16:13:43,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 16:13:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:43,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,503 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 16:13:43,713 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-15 16:13:43,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104433636] [2020-10-15 16:13:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,768 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 16:13:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104433636] [2020-10-15 16:13:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344342493] [2020-10-15 16:13:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:43,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,892 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 16:13:43,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319613656] [2020-10-15 16:13:43,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:43,894 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 16:13:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,999 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 16:13:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:44,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,001 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:13:44,001 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:44,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 16:13:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:44,005 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,006 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:44,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:44,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,007 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:13:44,220 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-15 16:13:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130882425] [2020-10-15 16:13:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,271 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 16:13:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130882425] [2020-10-15 16:13:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114733173] [2020-10-15 16:13:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:44,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,389 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 16:13:44,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061092751] [2020-10-15 16:13:44,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:44,392 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,523 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 16:13:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:44,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,524 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:44,525 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:44,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 16:13:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:44,530 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,530 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:44,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:44,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,531 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:13:44,741 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-15 16:13:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215328532] [2020-10-15 16:13:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,818 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 16:13:44,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215328532] [2020-10-15 16:13:44,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478636923] [2020-10-15 16:13:44,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:44,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:44,923 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 16:13:44,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925740222] [2020-10-15 16:13:44,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:44,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:44,925 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,043 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 16:13:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:45,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,045 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:45,045 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:13:45,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:13:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 16:13:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:45,051 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,052 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:45,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:45,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,053 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,264 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-15 16:13:45,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062761354] [2020-10-15 16:13:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,324 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 16:13:45,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062761354] [2020-10-15 16:13:45,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593995441] [2020-10-15 16:13:45,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:45,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:45,434 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 16:13:45,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:45,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064760201] [2020-10-15 16:13:45,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:45,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:45,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:45,436 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,645 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 16:13:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:45,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,646 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:45,646 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:45,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 16:13:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:45,651 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,651 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:45,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:45,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,652 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 16:13:45,860 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-15 16:13:45,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300218376] [2020-10-15 16:13:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,911 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 16:13:45,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300218376] [2020-10-15 16:13:45,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114649920] [2020-10-15 16:13:45,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:13:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:46,020 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 16:13:46,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:46,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593803286] [2020-10-15 16:13:46,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:46,022 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,177 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 16:13:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:46,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,180 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:13:46,180 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:13:46,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:13:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 16:13:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 16:13:46,184 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 16:13:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,184 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 16:13:46,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 16:13:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:46,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,185 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,395 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-15 16:13:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411220673] [2020-10-15 16:13:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,454 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 16:13:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411220673] [2020-10-15 16:13:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784393446] [2020-10-15 16:13:46,455 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 16:13:46,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:46,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:46,607 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 16:13:46,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 16:13:46,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964989377] [2020-10-15 16:13:46,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:13:46,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:13:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:46,609 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 16:13:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,715 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 16:13:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:46,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 16:13:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,717 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:46,717 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:46,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 16:13:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:13:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 16:13:46,722 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 16:13:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,722 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 16:13:46,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:13:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 16:13:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:46,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,723 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 16:13:46,933 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-15 16:13:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641432979] [2020-10-15 16:13:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,022 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 16:13:47,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641432979] [2020-10-15 16:13:47,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978501490] [2020-10-15 16:13:47,022 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 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 16:13:47,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,169 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 16:13:47,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533579790] [2020-10-15 16:13:47,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,170 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 16:13:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,228 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 16:13:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:47,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,230 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:13:47,230 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:47,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:13:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:47,235 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,235 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:47,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,236 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:13:47,448 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-15 16:13:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434692069] [2020-10-15 16:13:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,523 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 16:13:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434692069] [2020-10-15 16:13:47,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939775035] [2020-10-15 16:13:47,524 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 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 16:13:47,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:47,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607127090] [2020-10-15 16:13:47,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,669 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,735 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 16:13:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:47,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,737 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:47,738 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:47,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 16:13:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:47,743 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,743 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:47,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,744 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 16:13:47,954 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-15 16:13:47,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648612381] [2020-10-15 16:13:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,025 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 16:13:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648612381] [2020-10-15 16:13:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367729121] [2020-10-15 16:13:48,026 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 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 16:13:48,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,157 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 16:13:48,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212200724] [2020-10-15 16:13:48,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,159 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,235 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 16:13:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:48,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,237 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:13:48,237 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:13:48,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:13:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 16:13:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:13:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 16:13:48,242 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 16:13:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,242 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 16:13:48,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 16:13:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:48,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,243 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:13:48,456 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-15 16:13:48,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979978507] [2020-10-15 16:13:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,523 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 16:13:48,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979978507] [2020-10-15 16:13:48,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531832788] [2020-10-15 16:13:48,524 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 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 16:13:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,707 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 16:13:48,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136706900] [2020-10-15 16:13:48,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,709 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 16:13:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,831 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 16:13:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:48,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,833 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:48,833 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:48,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 16:13:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 16:13:48,839 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 16:13:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,839 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 16:13:48,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 16:13:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,840 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:13:49,053 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-15 16:13:49,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101188628] [2020-10-15 16:13:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,137 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 16:13:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101188628] [2020-10-15 16:13:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780092913] [2020-10-15 16:13:49,138 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 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 16:13:49,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:49,321 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 16:13:49,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745549732] [2020-10-15 16:13:49,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,325 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,477 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:49,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,478 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:49,478 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:13:49,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:13:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 16:13:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 16:13:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 16:13:49,483 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 16:13:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,484 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 16:13:49,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 16:13:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,485 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,694 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-15 16:13:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194289984] [2020-10-15 16:13:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194289984] [2020-10-15 16:13:49,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956176961] [2020-10-15 16:13:49,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:49,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51990763] [2020-10-15 16:13:49,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,897 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,948 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 16:13:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:49,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,950 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:13:49,951 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:49,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 16:13:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 16:13:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 16:13:49,954 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 16:13:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,955 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 16:13:49,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 16:13:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:13:50,165 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-15 16:13:50,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532280779] [2020-10-15 16:13:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,243 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 16:13:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532280779] [2020-10-15 16:13:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934391790] [2020-10-15 16:13:50,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,408 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 16:13:50,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552608744] [2020-10-15 16:13:50,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,411 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,524 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 16:13:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:50,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,526 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:50,526 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:13:50,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:13:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 16:13:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 16:13:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 16:13:50,529 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 16:13:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,530 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 16:13:50,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 16:13:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:13:50,738 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-15 16:13:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317203846] [2020-10-15 16:13:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,803 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 16:13:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317203846] [2020-10-15 16:13:50,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810616705] [2020-10-15 16:13:50,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,933 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 16:13:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53108671] [2020-10-15 16:13:50,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,935 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 16:13:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,059 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:51,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,061 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:51,061 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:13:51,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:13:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 16:13:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 16:13:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 16:13:51,065 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 16:13:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,065 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 16:13:51,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 16:13:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,276 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-15 16:13:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608442329] [2020-10-15 16:13:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,357 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 16:13:51,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608442329] [2020-10-15 16:13:51,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872062411] [2020-10-15 16:13:51,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,490 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 16:13:51,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107871593] [2020-10-15 16:13:51,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,492 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,598 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 16:13:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:51,599 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,600 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:51,600 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:51,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 16:13:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:51,604 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,604 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:51,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,605 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:13:51,806 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-15 16:13:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361355729] [2020-10-15 16:13:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361355729] [2020-10-15 16:13:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402858140] [2020-10-15 16:13:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:51,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97713443] [2020-10-15 16:13:52,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,021 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,149 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 16:13:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:52,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,151 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:52,151 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:52,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 16:13:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 16:13:52,156 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 16:13:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 16:13:52,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 16:13:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,158 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,369 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-15 16:13:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302359853] [2020-10-15 16:13:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302359853] [2020-10-15 16:13:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70667930] [2020-10-15 16:13:52,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329360609] [2020-10-15 16:13:52,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,597 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 16:13:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,666 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 16:13:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:52,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,671 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:13:52,672 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:13:52,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:13:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 16:13:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 16:13:52,676 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 16:13:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,677 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 16:13:52,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 16:13:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:13:52,878 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-15 16:13:52,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739169010] [2020-10-15 16:13:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,993 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 16:13:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739169010] [2020-10-15 16:13:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382960274] [2020-10-15 16:13:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:53,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,134 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 16:13:53,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364830767] [2020-10-15 16:13:53,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,136 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 16:13:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,267 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 16:13:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:53,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,272 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:13:53,272 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:13:53,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:13:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 16:13:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:53,275 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,276 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:53,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 16:13:53,477 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-15 16:13:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023066955] [2020-10-15 16:13:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,546 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 16:13:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023066955] [2020-10-15 16:13:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051721844] [2020-10-15 16:13:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,675 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 16:13:53,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213170206] [2020-10-15 16:13:53,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,677 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,824 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:53,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,826 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:53,826 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:53,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 16:13:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 16:13:53,831 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 16:13:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,831 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 16:13:53,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 16:13:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,832 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:13:54,041 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-15 16:13:54,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927069392] [2020-10-15 16:13:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927069392] [2020-10-15 16:13:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066152943] [2020-10-15 16:13:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996026924] [2020-10-15 16:13:54,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,272 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,357 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:13:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:54,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,359 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:54,359 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:54,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 16:13:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:54,363 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,363 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:54,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 16:13:54,573 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-15 16:13:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373803573] [2020-10-15 16:13:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,637 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 16:13:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373803573] [2020-10-15 16:13:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83143474] [2020-10-15 16:13:54,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,763 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 16:13:54,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124170162] [2020-10-15 16:13:54,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,765 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,930 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 16:13:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:54,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,931 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:13:54,931 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:54,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 16:13:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 16:13:54,935 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 16:13:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,935 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 16:13:54,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 16:13:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,936 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,142 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-15 16:13:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438317204] [2020-10-15 16:13:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438317204] [2020-10-15 16:13:55,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970060537] [2020-10-15 16:13:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:13:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610756528] [2020-10-15 16:13:55,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:55,270 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 16:13:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,358 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 16:13:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:55,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:13:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,360 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:55,360 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:55,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 16:13:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:55,364 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,364 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:55,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,365 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:13:55,576 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-15 16:13:55,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285130831] [2020-10-15 16:13:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285130831] [2020-10-15 16:13:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436096538] [2020-10-15 16:13:55,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814993074] [2020-10-15 16:13:55,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,784 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,991 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 16:13:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:55,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,993 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:55,993 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:55,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:13:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 16:13:55,998 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 16:13:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,998 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 16:13:55,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 16:13:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:13:56,206 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-15 16:13:56,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018967923] [2020-10-15 16:13:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,267 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 16:13:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018967923] [2020-10-15 16:13:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980008431] [2020-10-15 16:13:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,409 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 16:13:56,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765601313] [2020-10-15 16:13:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,411 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,587 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:56,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,589 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:56,589 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:56,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 16:13:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:56,593 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,593 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:56,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,594 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,795 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-15 16:13:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915426971] [2020-10-15 16:13:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915426971] [2020-10-15 16:13:56,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473986562] [2020-10-15 16:13:56,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:56,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763361214] [2020-10-15 16:13:57,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,022 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,347 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 16:13:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:57,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,349 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:13:57,350 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:13:57,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:13:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 16:13:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:57,354 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,355 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:57,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 16:13:57,566 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-15 16:13:57,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197599487] [2020-10-15 16:13:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,622 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 16:13:57,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197599487] [2020-10-15 16:13:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460459544] [2020-10-15 16:13:57,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:57,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:57,775 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 16:13:57,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502119404] [2020-10-15 16:13:57,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,776 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,019 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 16:13:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:58,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,020 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:13:58,020 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:58,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 16:13:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 16:13:58,025 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 16:13:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 16:13:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 16:13:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,236 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-15 16:13:58,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331242194] [2020-10-15 16:13:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,294 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 16:13:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331242194] [2020-10-15 16:13:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646834077] [2020-10-15 16:13:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:58,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,465 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 16:13:58,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178736483] [2020-10-15 16:13:58,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,467 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,639 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 16:13:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:58,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,641 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:13:58,641 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:58,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 16:13:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 16:13:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 16:13:58,645 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 16:13:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,645 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 16:13:58,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 16:13:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:13:58,858 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-15 16:13:58,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956944139] [2020-10-15 16:13:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,916 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 16:13:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956944139] [2020-10-15 16:13:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269774321] [2020-10-15 16:13:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,043 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 16:13:59,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473665128] [2020-10-15 16:13:59,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,044 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,276 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 16:13:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:59,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,278 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:13:59,278 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:13:59,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:13:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:13:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 16:13:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 16:13:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 16:13:59,282 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 16:13:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,282 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 16:13:59,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 16:13:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,283 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,494 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-15 16:13:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967752641] [2020-10-15 16:13:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967752641] [2020-10-15 16:13:59,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002225715] [2020-10-15 16:13:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393679977] [2020-10-15 16:13:59,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,661 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 16:13:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,958 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 16:13:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:59,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,960 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:59,960 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:59,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 16:13:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 16:13:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 16:13:59,965 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 16:13:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,965 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 16:13:59,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 16:13:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:14:00,177 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-15 16:14:00,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974828837] [2020-10-15 16:14:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,230 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 16:14:00,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974828837] [2020-10-15 16:14:00,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674562123] [2020-10-15 16:14:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:00,343 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 16:14:00,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475449434] [2020-10-15 16:14:00,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:00,344 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 16:14:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,709 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 16:14:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:00,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,711 INFO L225 Difference]: With dead ends: 190 [2020-10-15 16:14:00,711 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:00,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 16:14:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 16:14:00,715 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 16:14:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,716 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 16:14:00,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 16:14:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:14:00,927 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-15 16:14:00,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126460776] [2020-10-15 16:14:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,979 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 16:14:00,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126460776] [2020-10-15 16:14:00,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629374700] [2020-10-15 16:14:00,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:01,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:01,115 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 16:14:01,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940360093] [2020-10-15 16:14:01,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:01,117 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 16:14:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,451 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 16:14:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:01,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,453 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:01,453 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:01,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 16:14:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 16:14:01,456 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 16:14:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,456 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 16:14:01,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 16:14:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:14:01,657 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-15 16:14:01,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495150299] [2020-10-15 16:14:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,724 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 16:14:01,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495150299] [2020-10-15 16:14:01,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419924565] [2020-10-15 16:14:01,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:01,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,849 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 16:14:01,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785596873] [2020-10-15 16:14:01,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:01,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:01,851 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 16:14:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,995 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 16:14:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:01,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,997 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:01,997 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:14:01,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:14:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 16:14:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 16:14:02,001 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 16:14:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,001 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 16:14:02,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 16:14:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,002 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:14:02,203 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-15 16:14:02,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024377637] [2020-10-15 16:14:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024377637] [2020-10-15 16:14:02,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109397306] [2020-10-15 16:14:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:02,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:02,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187463395] [2020-10-15 16:14:02,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:02,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:02,423 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 16:14:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,571 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 16:14:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:02,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,573 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:14:02,574 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:02,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 16:14:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 16:14:02,577 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 16:14:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,578 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 16:14:02,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 16:14:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:14:02,788 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-15 16:14:02,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711857414] [2020-10-15 16:14:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,840 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 16:14:02,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711857414] [2020-10-15 16:14:02,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967863617] [2020-10-15 16:14:02,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,988 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 16:14:02,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046772488] [2020-10-15 16:14:02,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:02,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:02,990 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,173 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 16:14:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:03,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,175 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:14:03,175 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:14:03,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:14:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 16:14:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 16:14:03,179 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 16:14:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,179 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 16:14:03,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 16:14:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,180 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 16:14:03,390 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-15 16:14:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103995504] [2020-10-15 16:14:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103995504] [2020-10-15 16:14:03,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845965461] [2020-10-15 16:14:03,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:03,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069810316] [2020-10-15 16:14:03,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:03,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:03,578 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 16:14:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,797 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 16:14:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:03,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,799 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:03,800 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:03,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 16:14:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:14:03,804 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:14:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,804 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:14:03,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:14:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,009 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-15 16:14:04,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044098677] [2020-10-15 16:14:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,082 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 16:14:04,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044098677] [2020-10-15 16:14:04,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764583262] [2020-10-15 16:14:04,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,203 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 16:14:04,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:04,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686381416] [2020-10-15 16:14:04,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:04,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:04,205 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:14:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,454 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 16:14:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:14:04,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,455 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:04,455 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:04,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 16:14:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:14:04,458 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:14:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,458 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:14:04,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:14:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:04,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,459 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,660 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-15 16:14:04,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524786814] [2020-10-15 16:14:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524786814] [2020-10-15 16:14:04,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928340210] [2020-10-15 16:14:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:04,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:04,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686200391] [2020-10-15 16:14:04,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:04,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:04,825 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:14:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,012 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 16:14:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:05,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,014 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:14:05,014 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:14:05,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:14:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 16:14:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:14:05,018 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:14:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,018 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:14:05,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:14:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:05,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,229 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-15 16:14:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908997809] [2020-10-15 16:14:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,283 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 16:14:05,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908997809] [2020-10-15 16:14:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187725216] [2020-10-15 16:14:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:05,453 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 16:14:05,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:05,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035379531] [2020-10-15 16:14:05,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:05,454 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:14:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,788 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 16:14:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:05,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,790 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:05,790 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 16:14:05,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 16:14:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 16:14:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:14:05,794 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:14:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,794 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:14:05,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:14:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:05,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,795 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,004 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-15 16:14:06,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787332743] [2020-10-15 16:14:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787332743] [2020-10-15 16:14:06,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869241776] [2020-10-15 16:14:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:06,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901575281] [2020-10-15 16:14:06,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:06,176 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:14:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:06,426 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 16:14:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:14:06,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:06,428 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:06,428 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:06,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 16:14:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:14:06,432 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:14:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:06,432 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:14:06,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:14:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:06,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:06,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 16:14:06,635 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-15 16:14:06,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254054463] [2020-10-15 16:14:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,692 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 16:14:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254054463] [2020-10-15 16:14:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023797628] [2020-10-15 16:14:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:06,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:06,825 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 16:14:06,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:06,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966996934] [2020-10-15 16:14:06,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:06,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:06,826 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:14:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,148 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 16:14:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:07,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,150 INFO L225 Difference]: With dead ends: 192 [2020-10-15 16:14:07,151 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 16:14:07,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 16:14:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 16:14:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:14:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 16:14:07,154 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 16:14:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,154 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 16:14:07,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 16:14:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:07,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,155 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,356 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-15 16:14:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790156453] [2020-10-15 16:14:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790156453] [2020-10-15 16:14:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737817776] [2020-10-15 16:14:07,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:07,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077858711] [2020-10-15 16:14:07,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:07,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:07,533 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,844 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 16:14:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:07,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,846 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:07,846 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:07,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 16:14:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:14:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 16:14:07,849 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 16:14:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,849 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 16:14:07,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 16:14:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,850 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 16:14:08,051 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-15 16:14:08,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022848735] [2020-10-15 16:14:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022848735] [2020-10-15 16:14:08,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444602700] [2020-10-15 16:14:08,126 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 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 16:14:08,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:08,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533030881] [2020-10-15 16:14:08,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:08,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:08,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:08,281 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 16:14:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,422 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 16:14:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:08,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 16:14:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,425 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:08,425 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:08,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:14:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:14:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 16:14:08,427 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 16:14:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,428 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 16:14:08,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:14:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 16:14:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:08,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,429 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,629 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-15 16:14:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94827304] [2020-10-15 16:14:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94827304] [2020-10-15 16:14:08,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33378675] [2020-10-15 16:14:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461438497] [2020-10-15 16:14:08,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,897 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 16:14:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,945 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:14:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:08,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,947 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:14:08,947 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:14:08,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:14:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 16:14:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:08,950 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,951 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:08,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:08,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,951 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:14:09,161 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-15 16:14:09,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064925044] [2020-10-15 16:14:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064925044] [2020-10-15 16:14:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853545201] [2020-10-15 16:14:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:09,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916608034] [2020-10-15 16:14:09,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,474 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,562 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 16:14:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:09,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,563 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:14:09,564 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:09,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 16:14:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:09,570 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,571 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:09,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:09,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,572 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,786 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-15 16:14:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375047935] [2020-10-15 16:14:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375047935] [2020-10-15 16:14:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8909299] [2020-10-15 16:14:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968271260] [2020-10-15 16:14:10,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,062 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,150 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 16:14:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:10,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,152 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:10,152 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:10,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 16:14:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:14:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 16:14:10,155 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 16:14:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,155 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 16:14:10,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 16:14:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:10,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,155 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,356 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-15 16:14:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438273818] [2020-10-15 16:14:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438273818] [2020-10-15 16:14:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138326788] [2020-10-15 16:14:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:10,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433897825] [2020-10-15 16:14:10,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,610 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 16:14:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,714 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 16:14:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:10,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,715 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:10,715 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:10,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 16:14:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 16:14:10,719 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 16:14:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,719 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 16:14:10,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 16:14:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:10,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,720 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 16:14:10,928 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-15 16:14:10,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961935716] [2020-10-15 16:14:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961935716] [2020-10-15 16:14:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526131898] [2020-10-15 16:14:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706762502] [2020-10-15 16:14:11,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,160 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 16:14:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,294 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 16:14:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:11,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,297 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:11,297 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 16:14:11,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 16:14:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 16:14:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 16:14:11,300 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 16:14:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,300 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 16:14:11,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 16:14:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:11,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,300 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,501 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-15 16:14:11,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198757284] [2020-10-15 16:14:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198757284] [2020-10-15 16:14:11,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753904555] [2020-10-15 16:14:11,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620227430] [2020-10-15 16:14:11,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,735 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,944 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 16:14:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:11,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,947 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:11,947 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:11,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 16:14:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 16:14:11,952 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 16:14:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,953 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 16:14:11,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 16:14:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,954 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,166 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-15 16:14:12,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753817264] [2020-10-15 16:14:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,295 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 16:14:12,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753817264] [2020-10-15 16:14:12,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481587005] [2020-10-15 16:14:12,296 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 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 16:14:12,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,525 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 16:14:12,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124694103] [2020-10-15 16:14:12,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,527 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 16:14:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:12,582 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 16:14:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:12,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:12,583 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:14:12,583 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:14:12,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:14:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 16:14:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 16:14:12,587 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 16:14:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:12,587 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 16:14:12,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 16:14:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:12,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:12,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 16:14:12,796 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-15 16:14:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573301608] [2020-10-15 16:14:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,880 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 16:14:12,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573301608] [2020-10-15 16:14:12,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435092649] [2020-10-15 16:14:12,881 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 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 16:14:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:13,038 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 16:14:13,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:13,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:13,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980488480] [2020-10-15 16:14:13,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:13,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:13,040 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,187 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 16:14:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:13,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,189 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:14:13,189 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:13,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 16:14:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:13,193 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,193 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:13,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,194 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,396 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-15 16:14:13,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158678219] [2020-10-15 16:14:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158678219] [2020-10-15 16:14:13,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867923625] [2020-10-15 16:14:13,473 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 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 16:14:13,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:13,666 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 16:14:13,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:13,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:13,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045336140] [2020-10-15 16:14:13,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:13,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:13,667 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,855 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:13,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,857 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:13,857 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:13,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 16:14:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 16:14:13,861 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 16:14:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,861 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 16:14:13,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 16:14:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,862 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 16:14:14,074 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-15 16:14:14,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633346168] [2020-10-15 16:14:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,157 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 16:14:14,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633346168] [2020-10-15 16:14:14,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565557706] [2020-10-15 16:14:14,158 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 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 16:14:14,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,314 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 16:14:14,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944043785] [2020-10-15 16:14:14,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,316 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 16:14:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,496 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:14,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,498 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:14,499 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:14,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 16:14:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:14,502 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,502 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:14,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,503 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:14:14,703 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-15 16:14:14,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233396323] [2020-10-15 16:14:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,782 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 16:14:14,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233396323] [2020-10-15 16:14:14,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050735154] [2020-10-15 16:14:14,783 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 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 16:14:14,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:14,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,952 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 16:14:14,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60490489] [2020-10-15 16:14:14,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,953 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,142 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 16:14:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:15,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,144 INFO L225 Difference]: With dead ends: 184 [2020-10-15 16:14:15,144 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:15,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 16:14:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 16:14:15,147 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 16:14:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,148 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 16:14:15,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 16:14:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,148 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 16:14:15,358 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-15 16:14:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846991268] [2020-10-15 16:14:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,440 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 16:14:15,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846991268] [2020-10-15 16:14:15,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407838862] [2020-10-15 16:14:15,441 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 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 16:14:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,598 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 16:14:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179094983] [2020-10-15 16:14:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,600 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 16:14:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,805 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 16:14:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:15,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,807 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:15,807 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:15,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 16:14:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 16:14:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 16:14:15,810 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 16:14:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,810 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 16:14:15,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 16:14:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,811 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,022 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-15 16:14:16,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770754819] [2020-10-15 16:14:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,106 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 16:14:16,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770754819] [2020-10-15 16:14:16,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207190814] [2020-10-15 16:14:16,106 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 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 16:14:16,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,260 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 16:14:16,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76246239] [2020-10-15 16:14:16,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,262 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,419 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 16:14:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:16,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,421 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:16,421 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 16:14:16,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 16:14:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 16:14:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 16:14:16,425 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 16:14:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,425 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 16:14:16,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 16:14:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,627 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-15 16:14:16,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466972982] [2020-10-15 16:14:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,718 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 16:14:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466972982] [2020-10-15 16:14:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579707584] [2020-10-15 16:14:16,719 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 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 16:14:16,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,894 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 16:14:16,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126129690] [2020-10-15 16:14:16,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,895 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,141 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:17,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,143 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:17,143 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:17,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 16:14:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 16:14:17,146 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 16:14:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,146 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 16:14:17,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 16:14:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,348 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-15 16:14:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061454583] [2020-10-15 16:14:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,438 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 16:14:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061454583] [2020-10-15 16:14:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635706645] [2020-10-15 16:14:17,439 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 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 16:14:17,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,583 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 16:14:17,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255732095] [2020-10-15 16:14:17,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,584 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,779 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:17,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,781 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:17,781 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:17,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 16:14:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 16:14:17,785 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 16:14:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,785 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 16:14:17,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 16:14:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,786 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,987 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-15 16:14:17,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518821622] [2020-10-15 16:14:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,103 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 16:14:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518821622] [2020-10-15 16:14:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423667630] [2020-10-15 16:14:18,104 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 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 16:14:18,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,256 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 16:14:18,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405062918] [2020-10-15 16:14:18,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,258 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,319 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 16:14:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:18,320 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,321 INFO L225 Difference]: With dead ends: 182 [2020-10-15 16:14:18,322 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:14:18,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:14:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 16:14:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 16:14:18,325 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 16:14:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,326 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 16:14:18,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 16:14:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,327 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 16:14:18,527 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-15 16:14:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565445404] [2020-10-15 16:14:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,635 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 16:14:18,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565445404] [2020-10-15 16:14:18,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446949703] [2020-10-15 16:14:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:18,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,784 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 16:14:18,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006994388] [2020-10-15 16:14:18,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,786 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 16:14:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,957 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 16:14:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:18,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,959 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:18,959 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:18,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 16:14:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:18,963 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,963 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:18,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,964 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,168 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-15 16:14:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688713048] [2020-10-15 16:14:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,262 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 16:14:19,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688713048] [2020-10-15 16:14:19,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276148970] [2020-10-15 16:14:19,263 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 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 16:14:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:19,462 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 16:14:19,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:19,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:19,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056048970] [2020-10-15 16:14:19,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:19,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:19,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:19,463 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,681 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 16:14:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:19,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,683 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:19,683 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 16:14:19,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 16:14:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 16:14:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 16:14:19,687 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 16:14:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,687 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 16:14:19,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 16:14:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,687 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,888 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-15 16:14:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126483125] [2020-10-15 16:14:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,961 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 16:14:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126483125] [2020-10-15 16:14:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475558775] [2020-10-15 16:14:19,962 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 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 16:14:20,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,158 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 16:14:20,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029548788] [2020-10-15 16:14:20,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,160 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:20,363 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 16:14:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:20,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:20,365 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:20,365 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:20,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 16:14:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:20,369 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:20,369 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:20,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:20,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:20,370 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:20,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 16:14:20,580 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-15 16:14:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:20,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425645591] [2020-10-15 16:14:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,662 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 16:14:20,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425645591] [2020-10-15 16:14:20,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294122229] [2020-10-15 16:14:20,663 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 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 16:14:20,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,808 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 16:14:20,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477615307] [2020-10-15 16:14:20,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,810 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,047 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 16:14:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:21,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,049 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:21,050 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:21,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 16:14:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 16:14:21,053 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 16:14:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,053 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 16:14:21,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 16:14:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,054 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,255 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-15 16:14:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798877033] [2020-10-15 16:14:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798877033] [2020-10-15 16:14:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638514941] [2020-10-15 16:14:21,336 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 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 16:14:21,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:21,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:21,512 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 16:14:21,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:21,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568710908] [2020-10-15 16:14:21,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:21,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:21,514 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,771 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 16:14:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:21,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,774 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:21,774 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:21,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 16:14:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 16:14:21,777 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 16:14:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,778 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 16:14:21,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 16:14:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,778 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 16:14:21,985 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-15 16:14:21,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029320421] [2020-10-15 16:14:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,089 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 16:14:22,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029320421] [2020-10-15 16:14:22,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490709716] [2020-10-15 16:14:22,090 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 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 16:14:22,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:22,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,236 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 16:14:22,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571012158] [2020-10-15 16:14:22,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,238 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,328 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 16:14:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:22,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,330 INFO L225 Difference]: With dead ends: 178 [2020-10-15 16:14:22,330 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 16:14:22,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 16:14:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 16:14:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 16:14:22,334 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 16:14:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:22,334 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 16:14:22,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 16:14:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:22,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:22,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,536 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-15 16:14:22,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:22,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438681035] [2020-10-15 16:14:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,631 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 16:14:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438681035] [2020-10-15 16:14:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010765050] [2020-10-15 16:14:22,632 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 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 16:14:22,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,801 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 16:14:22,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510941079] [2020-10-15 16:14:22,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,803 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 16:14:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,995 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 16:14:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:22,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,998 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:14:22,998 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:14:22,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:14:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 16:14:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 16:14:23,001 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 16:14:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,002 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 16:14:23,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 16:14:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 16:14:23,211 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-15 16:14:23,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333095977] [2020-10-15 16:14:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,290 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 16:14:23,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333095977] [2020-10-15 16:14:23,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094468105] [2020-10-15 16:14:23,291 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 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 16:14:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:23,473 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 16:14:23,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:23,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771642086] [2020-10-15 16:14:23,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:23,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:23,474 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,724 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:14:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:23,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,726 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:23,726 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:23,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 16:14:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 16:14:23,729 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 16:14:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,729 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 16:14:23,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 16:14:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,730 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,937 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-15 16:14:23,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194586167] [2020-10-15 16:14:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,026 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 16:14:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194586167] [2020-10-15 16:14:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891130905] [2020-10-15 16:14:24,027 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 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 16:14:24,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:24,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:24,166 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 16:14:24,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:24,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:24,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737000429] [2020-10-15 16:14:24,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:24,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:24,168 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:24,268 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 16:14:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:24,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:24,270 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:14:24,271 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:14:24,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:14:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 16:14:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 16:14:24,274 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 16:14:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:24,274 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 16:14:24,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 16:14:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:24,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:24,274 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:24,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 16:14:24,475 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-15 16:14:24,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:24,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441205995] [2020-10-15 16:14:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,553 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 16:14:24,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441205995] [2020-10-15 16:14:24,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827003650] [2020-10-15 16:14:24,554 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 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 16:14:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:24,706 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 16:14:24,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:24,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:24,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5342982] [2020-10-15 16:14:24,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:24,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:24,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:24,708 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 16:14:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:24,932 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 16:14:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:24,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:24,934 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:24,934 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:24,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 16:14:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 16:14:24,938 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 16:14:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 16:14:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 16:14:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:24,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:24,938 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:25,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:25,139 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-15 16:14:25,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:25,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895753429] [2020-10-15 16:14:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:25,216 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 16:14:25,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895753429] [2020-10-15 16:14:25,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898822835] [2020-10-15 16:14:25,216 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 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 16:14:25,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:25,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:25,366 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 16:14:25,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:25,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002188378] [2020-10-15 16:14:25,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:25,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:25,368 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:25,498 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 16:14:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:25,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:25,500 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:14:25,500 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:14:25,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:14:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 16:14:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:25,504 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:25,504 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:25,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:25,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:25,505 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:25,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:25,706 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-15 16:14:25,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:25,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797870195] [2020-10-15 16:14:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:25,780 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 16:14:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797870195] [2020-10-15 16:14:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5704352] [2020-10-15 16:14:25,780 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 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 16:14:25,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:25,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:25,966 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 16:14:25,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:25,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:25,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068709039] [2020-10-15 16:14:25,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:25,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:25,968 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:26,310 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 16:14:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:26,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:26,312 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:26,312 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:14:26,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:14:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 16:14:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:26,315 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:26,315 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:26,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:26,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:26,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:26,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:26,517 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-15 16:14:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288689114] [2020-10-15 16:14:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:26,588 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 16:14:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288689114] [2020-10-15 16:14:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431782170] [2020-10-15 16:14:26,588 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 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 16:14:26,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:26,762 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 16:14:26,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:26,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116373087] [2020-10-15 16:14:26,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:26,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:26,764 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:27,021 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 16:14:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:27,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:27,024 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:27,024 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:27,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 16:14:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:27,027 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:27,027 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:27,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:27,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:27,027 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:27,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:27,228 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-15 16:14:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:27,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110631129] [2020-10-15 16:14:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:27,298 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 16:14:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110631129] [2020-10-15 16:14:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432126709] [2020-10-15 16:14:27,298 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 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 16:14:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:27,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:27,490 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 16:14:27,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:27,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:27,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725533623] [2020-10-15 16:14:27,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:27,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:27,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:27,492 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:27,932 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 16:14:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:27,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:27,934 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:14:27,934 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:27,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:27,938 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:27,938 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:27,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:27,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:27,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:28,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 16:14:28,141 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-15 16:14:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:28,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406016507] [2020-10-15 16:14:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:28,212 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 16:14:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406016507] [2020-10-15 16:14:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517975650] [2020-10-15 16:14:28,213 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 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 16:14:28,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:28,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:28,377 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 16:14:28,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:28,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759801166] [2020-10-15 16:14:28,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:28,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:28,379 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:28,713 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:14:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:28,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:28,715 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:28,715 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:14:28,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:14:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 16:14:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 16:14:28,718 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 16:14:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:28,719 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 16:14:28,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 16:14:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:28,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:28,719 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:28,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:28,920 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-15 16:14:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:28,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795603187] [2020-10-15 16:14:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:28,992 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 16:14:28,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795603187] [2020-10-15 16:14:28,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368284880] [2020-10-15 16:14:28,992 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 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 16:14:29,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:29,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:29,195 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 16:14:29,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:29,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:29,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001041347] [2020-10-15 16:14:29,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:29,196 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 16:14:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:29,482 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 16:14:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:29,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:29,484 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:29,484 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:29,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 16:14:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:29,488 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:29,488 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:29,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:29,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:29,489 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:29,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:14:29,698 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-15 16:14:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:29,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002202993] [2020-10-15 16:14:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:29,772 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 16:14:29,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002202993] [2020-10-15 16:14:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020762818] [2020-10-15 16:14:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:29,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:29,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:29,981 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 16:14:29,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:29,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:29,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40670127] [2020-10-15 16:14:29,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:29,982 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:30,394 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 16:14:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:14:30,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:30,396 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:30,397 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:30,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:30,400 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:30,400 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:30,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:30,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:30,401 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:30,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:14:30,602 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-15 16:14:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343586770] [2020-10-15 16:14:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:30,668 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 16:14:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343586770] [2020-10-15 16:14:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913781056] [2020-10-15 16:14:30,669 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 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 16:14:30,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:30,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:30,881 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 16:14:30,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:30,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181428787] [2020-10-15 16:14:30,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:30,882 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:31,408 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 16:14:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:31,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:31,410 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:31,411 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:14:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 16:14:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 16:14:31,415 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 16:14:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 16:14:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 16:14:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:31,416 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:31,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 16:14:31,625 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-15 16:14:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:31,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068919138] [2020-10-15 16:14:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:31,700 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 16:14:31,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068919138] [2020-10-15 16:14:31,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121523851] [2020-10-15 16:14:31,701 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 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 16:14:31,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:33,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:33,963 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 16:14:33,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:33,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:33,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093129750] [2020-10-15 16:14:33,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:33,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 16:14:33,964 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 16:14:38,277 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:14:42,508 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:14:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:42,961 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 16:14:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:42,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:42,963 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:14:42,963 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:14:42,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:14:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:14:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 16:14:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 16:14:42,966 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 16:14:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:42,966 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 16:14:42,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 16:14:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:42,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:42,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:43,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:14:43,168 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-15 16:14:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:43,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915019375] [2020-10-15 16:14:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:43,244 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 16:14:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915019375] [2020-10-15 16:14:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337278753] [2020-10-15 16:14:43,245 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 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 16:14:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:43,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:43,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:44,537 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 16:14:44,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:44,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334032258] [2020-10-15 16:14:44,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:14:44,540 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-15 16:14:47,021 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-15 16:14:53,432 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-15 16:14:56,981 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-15 16:15:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:33,552 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-15 16:15:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:15:33,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:15:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:33,553 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:15:33,553 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:15:33,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-15 16:15:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:15:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-15 16:15:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:15:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 16:15:33,556 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 16:15:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:33,556 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 16:15:33,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:15:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 16:15:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:33,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:33,557 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:33,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:33,758 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-15 16:15:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:33,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153294966] [2020-10-15 16:15:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:33,833 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 16:15:33,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153294966] [2020-10-15 16:15:33,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140046399] [2020-10-15 16:15:33,834 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 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 16:15:33,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:34,012 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 16:15:34,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:34,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:34,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638090801] [2020-10-15 16:15:34,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:34,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:34,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:34,014 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 16:15:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:34,292 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 16:15:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:34,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:34,293 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:15:34,293 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:15:34,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:15:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 16:15:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 16:15:34,297 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 16:15:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:34,297 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 16:15:34,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 16:15:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:34,298 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:34,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:34,501 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-15 16:15:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868745563] [2020-10-15 16:15:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:34,575 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 16:15:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868745563] [2020-10-15 16:15:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239587956] [2020-10-15 16:15:34,576 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 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 16:15:34,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:15:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:34,743 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 16:15:34,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:34,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:34,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346818574] [2020-10-15 16:15:34,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:34,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:34,745 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 16:15:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:35,029 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 16:15:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:35,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:35,030 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:15:35,030 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:15:35,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:15:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 16:15:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 16:15:35,033 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 16:15:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:35,034 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 16:15:35,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 16:15:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:35,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:35,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:35,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 16:15:35,238 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-15 16:15:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398005568] [2020-10-15 16:15:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:35,317 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 16:15:35,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398005568] [2020-10-15 16:15:35,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166819760] [2020-10-15 16:15:35,318 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 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 16:15:35,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:35,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:35,509 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 16:15:35,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:35,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461203138] [2020-10-15 16:15:35,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:35,511 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 16:15:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:35,880 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 16:15:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:35,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:35,882 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:15:35,882 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:15:35,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:15:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 16:15:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 16:15:35,886 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 16:15:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:35,886 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 16:15:35,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 16:15:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:35,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:35,887 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:36,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:15:36,095 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-15 16:15:36,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:36,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570709030] [2020-10-15 16:15:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:36,207 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 16:15:36,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570709030] [2020-10-15 16:15:36,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296037209] [2020-10-15 16:15:36,208 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 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 16:15:36,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:36,423 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 16:15:36,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:36,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528437878] [2020-10-15 16:15:36,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:36,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:36,424 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 16:15:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:36,858 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 16:15:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:15:36,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:36,860 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:15:36,860 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:15:36,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:15:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:15:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 16:15:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:15:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 16:15:36,865 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 16:15:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:36,865 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 16:15:36,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 16:15:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:36,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:36,866 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:37,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:15:37,070 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-15 16:15:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:37,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506582596] [2020-10-15 16:15:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:37,146 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 16:15:37,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506582596] [2020-10-15 16:15:37,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552598250] [2020-10-15 16:15:37,147 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 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 16:15:37,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:15:37,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:37,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:37,306 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 16:15:37,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:37,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067102164] [2020-10-15 16:15:37,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:37,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:37,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:37,308 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 16:15:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:37,727 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 16:15:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:15:37,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:37,729 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:15:37,729 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:15:37,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:15:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:15:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 16:15:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:15:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:15:37,733 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:15:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:37,733 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:15:37,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:15:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:37,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:37,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:37,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:37,942 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-15 16:15:37,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:37,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809264645] [2020-10-15 16:15:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:38,024 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 16:15:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809264645] [2020-10-15 16:15:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481976296] [2020-10-15 16:15:38,025 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 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 16:15:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:38,204 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 16:15:38,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:38,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:38,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795006999] [2020-10-15 16:15:38,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:38,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:38,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:38,206 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:15:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:38,638 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 16:15:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:15:38,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:38,640 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:15:38,640 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 16:15:38,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:15:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 16:15:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 16:15:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:38,645 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:38,645 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:38,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:38,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:38,646 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:38,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:38,850 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-15 16:15:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:38,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017979958] [2020-10-15 16:15:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:38,927 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 16:15:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017979958] [2020-10-15 16:15:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108062178] [2020-10-15 16:15:38,928 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 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 16:15:38,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:39,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:39,088 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 16:15:39,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:39,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:39,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388066232] [2020-10-15 16:15:39,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:39,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:39,090 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:39,565 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 16:15:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:15:39,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:39,566 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:15:39,567 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:15:39,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:15:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:15:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 16:15:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:39,570 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:39,570 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:39,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:39,571 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:39,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:15:39,771 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-15 16:15:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:39,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463871467] [2020-10-15 16:15:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:39,867 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 16:15:39,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463871467] [2020-10-15 16:15:39,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268374071] [2020-10-15 16:15:39,868 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 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 16:15:39,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:15:39,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:40,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:40,056 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 16:15:40,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:40,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:40,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140995700] [2020-10-15 16:15:40,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:40,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:40,058 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:40,689 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 16:15:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:15:40,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:40,691 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:15:40,691 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:15:40,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:15:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:15:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 16:15:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:15:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:15:40,694 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:15:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:40,694 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:15:40,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:15:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:40,695 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:40,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 16:15:40,895 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-15 16:15:40,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:40,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342551997] [2020-10-15 16:15:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:40,973 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 16:15:40,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342551997] [2020-10-15 16:15:40,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549870128] [2020-10-15 16:15:40,974 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 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 16:15:41,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:41,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:41,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:41,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:41,150 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 16:15:41,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:41,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103357374] [2020-10-15 16:15:41,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:41,152 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:15:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:41,648 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 16:15:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:15:41,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:41,649 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:15:41,649 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:15:41,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:15:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:15:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 16:15:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:41,652 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:41,652 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:41,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:41,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:41,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:41,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:41,856 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-15 16:15:41,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:41,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12908104] [2020-10-15 16:15:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:41,935 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 16:15:41,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12908104] [2020-10-15 16:15:41,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917773323] [2020-10-15 16:15:41,935 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 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 16:15:41,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:41,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:42,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:42,091 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 16:15:42,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:42,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:42,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959416925] [2020-10-15 16:15:42,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:42,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:42,093 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:42,733 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 16:15:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:42,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:42,734 INFO L225 Difference]: With dead ends: 240 [2020-10-15 16:15:42,734 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:15:42,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:15:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 16:15:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:15:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 16:15:42,737 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 16:15:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:42,737 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 16:15:42,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 16:15:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:42,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:42,738 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:42,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:15:42,938 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-15 16:15:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:42,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344708217] [2020-10-15 16:15:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:43,014 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 16:15:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344708217] [2020-10-15 16:15:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311440796] [2020-10-15 16:15:43,015 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 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 16:15:43,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:15:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:43,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:43,255 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 16:15:43,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:43,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:43,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578309762] [2020-10-15 16:15:43,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:43,258 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 16:15:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:44,082 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 16:15:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:44,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:44,085 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:15:44,085 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 16:15:44,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 16:15:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 16:15:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:15:44,092 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:15:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:44,092 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:15:44,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:15:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:44,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:44,093 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:44,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:44,295 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-15 16:15:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:44,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109858562] [2020-10-15 16:15:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:44,398 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 16:15:44,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109858562] [2020-10-15 16:15:44,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099978350] [2020-10-15 16:15:44,399 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 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 16:15:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:44,636 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 16:15:44,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:44,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617532038] [2020-10-15 16:15:44,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:44,638 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:15:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:44,911 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 16:15:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:15:44,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:44,913 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:15:44,913 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:15:44,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:15:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 16:15:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:15:44,917 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:15:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:44,917 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:15:44,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:15:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:44,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:44,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:45,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 16:15:45,128 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-15 16:15:45,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:45,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231750346] [2020-10-15 16:15:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:45,207 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 16:15:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231750346] [2020-10-15 16:15:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463120360] [2020-10-15 16:15:45,208 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 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 16:15:45,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:45,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:45,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:45,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:45,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423762604] [2020-10-15 16:15:45,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:45,390 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:15:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:45,885 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 16:15:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:15:45,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:45,887 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:15:45,887 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:15:45,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:15:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:15:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 16:15:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 16:15:45,890 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 16:15:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:45,890 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 16:15:45,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 16:15:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:45,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:45,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:46,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:46,092 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-15 16:15:46,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:46,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173588977] [2020-10-15 16:15:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:46,176 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 16:15:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173588977] [2020-10-15 16:15:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685783794] [2020-10-15 16:15:46,177 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 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 16:15:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:46,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:46,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:49,755 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 19 [2020-10-15 16:15:49,756 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 16:15:49,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:49,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:15:49,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378724424] [2020-10-15 16:15:49,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:15:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:15:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:15:49,757 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 16:15:51,538 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:16:13,398 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:16:51,188 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 16:17:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:08,672 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-15 16:17:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:17:08,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:17:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:08,674 INFO L225 Difference]: With dead ends: 260 [2020-10-15 16:17:08,674 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 16:17:08,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 16:17:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 16:17:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-15 16:17:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 16:17:08,677 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 16:17:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:08,678 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 16:17:08,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:17:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 16:17:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:08,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:08,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:08,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 16:17:08,879 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-15 16:17:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036650039] [2020-10-15 16:17:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:08,967 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 16:17:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036650039] [2020-10-15 16:17:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792895446] [2020-10-15 16:17:08,968 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 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 16:17:09,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:09,143 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 16:17:09,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:09,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143521689] [2020-10-15 16:17:09,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:09,145 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 16:17:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:09,347 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:17:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:09,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:09,348 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:09,348 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:09,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 16:17:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:17:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 16:17:09,350 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 16:17:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:09,350 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 16:17:09,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 16:17:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:09,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:09,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:09,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:09,552 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-15 16:17:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:09,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437316407] [2020-10-15 16:17:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:09,641 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 16:17:09,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437316407] [2020-10-15 16:17:09,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797633739] [2020-10-15 16:17:09,642 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 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 16:17:09,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:09,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:09,830 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 16:17:09,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:09,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272046965] [2020-10-15 16:17:09,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:09,831 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 16:17:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:10,146 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 16:17:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:10,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:10,147 INFO L225 Difference]: With dead ends: 205 [2020-10-15 16:17:10,148 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 16:17:10,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 16:17:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 16:17:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 16:17:10,152 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 16:17:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:10,152 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 16:17:10,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 16:17:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:10,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:10,153 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:10,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:10,354 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-15 16:17:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:10,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996998850] [2020-10-15 16:17:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:10,446 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 16:17:10,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996998850] [2020-10-15 16:17:10,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320949833] [2020-10-15 16:17:10,447 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 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 16:17:10,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:10,608 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 16:17:10,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:10,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873515784] [2020-10-15 16:17:10,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:10,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:10,609 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 16:17:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:10,882 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:17:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:10,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:10,883 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:10,883 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:10,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 16:17:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 16:17:10,886 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 16:17:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 16:17:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 16:17:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:10,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:10,887 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:11,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:11,088 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-15 16:17:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:11,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130984431] [2020-10-15 16:17:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:11,176 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 16:17:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130984431] [2020-10-15 16:17:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565825664] [2020-10-15 16:17:11,177 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 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 16:17:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:11,455 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 16:17:11,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:11,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:11,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767607510] [2020-10-15 16:17:11,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:11,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:11,457 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 16:17:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:11,832 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:17:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:11,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:11,835 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:11,835 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:11,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 16:17:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:17:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 16:17:11,841 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 16:17:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 16:17:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 16:17:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:11,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:11,843 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:12,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:17:12,055 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:12,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-15 16:17:12,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:12,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016159235] [2020-10-15 16:17:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:12,170 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 16:17:12,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016159235] [2020-10-15 16:17:12,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255978778] [2020-10-15 16:17:12,171 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 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 16:17:12,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:12,460 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 16:17:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307881951] [2020-10-15 16:17:12,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:12,462 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 16:17:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:13,004 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 16:17:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:13,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:13,006 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:17:13,007 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:17:13,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:17:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 16:17:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:17:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 16:17:13,012 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 16:17:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:13,013 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 16:17:13,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 16:17:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:13,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:13,013 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:13,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:13,225 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:13,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-15 16:17:13,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:13,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905882338] [2020-10-15 16:17:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:13,305 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 16:17:13,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905882338] [2020-10-15 16:17:13,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981752244] [2020-10-15 16:17:13,306 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 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 16:17:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:13,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:13,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:13,478 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 16:17:13,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:13,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:13,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303293732] [2020-10-15 16:17:13,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:13,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:13,479 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 16:17:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:13,857 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 16:17:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:13,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:13,858 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:17:13,859 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:17:13,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:13,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:17:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 16:17:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:17:13,862 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:17:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:13,862 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:17:13,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:17:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:13,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:13,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:14,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:17:14,072 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-15 16:17:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:14,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373326683] [2020-10-15 16:17:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:14,154 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 16:17:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373326683] [2020-10-15 16:17:14,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210551579] [2020-10-15 16:17:14,155 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 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 16:17:14,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:14,323 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 16:17:14,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:14,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857551838] [2020-10-15 16:17:14,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:14,325 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:14,635 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:17:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:14,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:14,637 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:14,637 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:14,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 16:17:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:17:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 16:17:14,641 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 16:17:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:14,641 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 16:17:14,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 16:17:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:14,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:14,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:14,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:17:14,843 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-15 16:17:14,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:14,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020596255] [2020-10-15 16:17:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:14,924 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 16:17:14,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020596255] [2020-10-15 16:17:14,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108024978] [2020-10-15 16:17:14,925 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 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 16:17:14,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:14,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:14,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:15,101 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 16:17:15,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:15,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:15,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908386831] [2020-10-15 16:17:15,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:15,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:15,103 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 16:17:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:15,567 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 16:17:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:17:15,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:15,568 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:17:15,568 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:17:15,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:17:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:17:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 16:17:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:17:15,572 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:17:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:15,572 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:17:15,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:17:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:15,573 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:15,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:15,778 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-15 16:17:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:15,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21127071] [2020-10-15 16:17:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:15,861 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 16:17:15,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21127071] [2020-10-15 16:17:15,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160765001] [2020-10-15 16:17:15,862 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 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 16:17:15,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:16,024 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 16:17:16,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:16,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:16,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261602240] [2020-10-15 16:17:16,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:16,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:16,027 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:17:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:16,427 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 16:17:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:16,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:16,429 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:17:16,429 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:17:16,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:17:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 16:17:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:16,433 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:16,433 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:16,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:16,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:16,434 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:16,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:16,637 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-15 16:17:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:16,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622036008] [2020-10-15 16:17:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:16,728 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 16:17:16,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622036008] [2020-10-15 16:17:16,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178065415] [2020-10-15 16:17:16,729 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 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 16:17:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:16,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:16,884 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 16:17:16,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:16,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982839474] [2020-10-15 16:17:16,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:16,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:16,886 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:17,193 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 16:17:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:17,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:17,195 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:17:17,195 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:17:17,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:17:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 16:17:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:17,201 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:17,201 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:17,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:17,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:17,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:17,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:17:17,402 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-15 16:17:17,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:17,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47727090] [2020-10-15 16:17:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,499 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 16:17:17,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47727090] [2020-10-15 16:17:17,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041230064] [2020-10-15 16:17:17,500 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 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 16:17:17,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:17,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:17,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:17,795 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 16:17:17,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:17,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:17,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055274930] [2020-10-15 16:17:17,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:17,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:17,797 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:18,464 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 16:17:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:18,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:18,466 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:17:18,466 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:17:18,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:17:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:17:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 16:17:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:17:18,471 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:17:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:18,471 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:17:18,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:17:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:18,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:18,472 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:18,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:18,673 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-15 16:17:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:18,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973686627] [2020-10-15 16:17:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:18,760 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 16:17:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973686627] [2020-10-15 16:17:18,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620145348] [2020-10-15 16:17:18,761 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 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 16:17:18,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:18,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:18,956 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 16:17:18,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:18,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:18,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762064282] [2020-10-15 16:17:18,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:18,958 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:17:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:19,544 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 16:17:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:17:19,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:19,546 INFO L225 Difference]: With dead ends: 222 [2020-10-15 16:17:19,546 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:17:19,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:17:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:17:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 16:17:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:19,550 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:19,550 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:19,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:19,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:19,551 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:19,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:19,752 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-15 16:17:19,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:19,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900616306] [2020-10-15 16:17:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:19,850 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 16:17:19,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900616306] [2020-10-15 16:17:19,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633305908] [2020-10-15 16:17:19,851 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 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 16:17:19,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:19,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:19,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:20,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:20,091 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 16:17:20,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:20,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:20,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820147260] [2020-10-15 16:17:20,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:20,094 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:21,009 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 16:17:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:21,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:21,010 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:17:21,011 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:17:21,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:17:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 16:17:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:17:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 16:17:21,016 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 16:17:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:21,016 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 16:17:21,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 16:17:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:21,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:21,017 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:21,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,221 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-15 16:17:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:21,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216796325] [2020-10-15 16:17:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:21,303 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 16:17:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216796325] [2020-10-15 16:17:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765863811] [2020-10-15 16:17:21,304 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 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 16:17:21,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:21,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:21,498 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 16:17:21,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:21,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:21,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133157872] [2020-10-15 16:17:21,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:21,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:21,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:21,499 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 16:17:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:22,340 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 16:17:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:22,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:22,342 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:17:22,342 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 16:17:22,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:17:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 16:17:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 16:17:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 16:17:22,347 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 16:17:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:22,347 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 16:17:22,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 16:17:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:22,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:22,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 16:17:22,557 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:22,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-15 16:17:22,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:22,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585862453] [2020-10-15 16:17:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:22,641 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 16:17:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585862453] [2020-10-15 16:17:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403536600] [2020-10-15 16:17:22,642 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 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 16:17:22,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:22,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:22,823 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 16:17:22,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818064112] [2020-10-15 16:17:22,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:22,825 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 16:17:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:23,246 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 16:17:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:17:23,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:23,247 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:17:23,247 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:17:23,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:17:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 16:17:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:17:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 16:17:23,250 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 16:17:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:23,251 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 16:17:23,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 16:17:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:23,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:23,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:23,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:17:23,452 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:23,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-15 16:17:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:23,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373074679] [2020-10-15 16:17:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:23,542 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 16:17:23,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373074679] [2020-10-15 16:17:23,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369250581] [2020-10-15 16:17:23,542 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 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 16:17:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:23,713 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 16:17:23,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:23,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:23,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499892886] [2020-10-15 16:17:23,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:23,715 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 16:17:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:24,281 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 16:17:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:24,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:24,283 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:17:24,283 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:17:24,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:17:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:17:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 16:17:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:17:24,285 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:17:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:24,285 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:17:24,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:17:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:24,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:24,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:24,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 16:17:24,487 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-15 16:17:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:24,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251009230] [2020-10-15 16:17:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:24,575 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 16:17:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251009230] [2020-10-15 16:17:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033339027] [2020-10-15 16:17:24,576 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 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 16:17:24,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:24,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:24,758 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 16:17:24,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:24,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:24,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282144379] [2020-10-15 16:17:24,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:24,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:24,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:24,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:24,761 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:25,375 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 16:17:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:25,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:25,376 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:17:25,376 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:17:25,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:17:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 16:17:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:17:25,378 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:17:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:25,379 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:17:25,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:17:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:25,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:25,379 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:25,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:17:25,580 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-15 16:17:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:25,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326581443] [2020-10-15 16:17:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:25,665 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 16:17:25,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326581443] [2020-10-15 16:17:25,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991818776] [2020-10-15 16:17:25,666 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 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 16:17:25,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:25,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:25,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:25,829 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 16:17:25,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:25,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609749166] [2020-10-15 16:17:25,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:25,831 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:26,480 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 16:17:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:26,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:26,481 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:17:26,481 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:26,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 16:17:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 16:17:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 16:17:26,485 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 16:17:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:26,485 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 16:17:26,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 16:17:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:26,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:26,485 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:26,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:17:26,686 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:26,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-15 16:17:26,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:26,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854140342] [2020-10-15 16:17:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:26,772 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 16:17:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854140342] [2020-10-15 16:17:26,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555582027] [2020-10-15 16:17:26,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:17:26,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:26,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:26,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:26,935 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 16:17:26,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:26,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:26,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595657281] [2020-10-15 16:17:26,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:26,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:26,937 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 16:17:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:27,581 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 16:17:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:17:27,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:27,582 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:17:27,582 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:17:27,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:17:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:17:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 16:17:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:17:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 16:17:27,586 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 16:17:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:27,586 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 16:17:27,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 16:17:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:27,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:27,587 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:27,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,795 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-15 16:17:27,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:27,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368658195] [2020-10-15 16:17:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368658195] [2020-10-15 16:17:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018429764] [2020-10-15 16:17:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:17:27,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:28,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:28,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:17:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988126434] [2020-10-15 16:17:28,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:17:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:17:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:28,174 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 16:17:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:28,487 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 16:17:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:28,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 16:17:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:28,490 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:17:28,490 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:17:28,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:17:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 16:17:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:28,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:17:28,495 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:17:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:28,495 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:17:28,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:17:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:17:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:28,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:28,496 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:28,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 16:17:28,708 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-15 16:17:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:28,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369879223] [2020-10-15 16:17:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369879223] [2020-10-15 16:17:28,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118677349] [2020-10-15 16:17:28,951 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 16:17:28,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:29,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:29,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753696574] [2020-10-15 16:17:29,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:29,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:29,217 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 16:17:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:29,311 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 16:17:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:17:29,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:29,313 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:17:29,313 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:17:29,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:17:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 16:17:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:17:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:17:29,316 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:17:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:29,317 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:17:29,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:17:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:29,317 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:29,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:17:29,526 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:29,527 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-15 16:17:29,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:29,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561571313] [2020-10-15 16:17:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561571313] [2020-10-15 16:17:29,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415144781] [2020-10-15 16:17:29,695 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 16:17:29,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:29,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62573034] [2020-10-15 16:17:29,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:29,909 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:17:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:30,004 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 16:17:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:30,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:30,006 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:17:30,006 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:17:30,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:17:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 16:17:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:17:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:17:30,008 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:17:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:30,008 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:17:30,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:17:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:30,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:30,009 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:30,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:30,218 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-15 16:17:30,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:30,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038731738] [2020-10-15 16:17:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038731738] [2020-10-15 16:17:30,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843890704] [2020-10-15 16:17:30,380 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 16:17:30,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:17:30,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:30,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:30,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053074875] [2020-10-15 16:17:30,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:30,643 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:17:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:30,755 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 16:17:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:30,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:30,756 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:17:30,756 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:17:30,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:17:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:17:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 16:17:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 16:17:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 16:17:30,760 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 16:17:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:30,760 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 16:17:30,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 16:17:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:30,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:30,760 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:30,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:30,961 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-15 16:17:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:30,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026504356] [2020-10-15 16:17:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026504356] [2020-10-15 16:17:31,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269759307] [2020-10-15 16:17:31,090 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 16:17:31,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:17:31,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:31,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:31,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:31,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304095098] [2020-10-15 16:17:31,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:31,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:31,303 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 16:17:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:31,438 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:17:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:31,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:31,439 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:17:31,440 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:31,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:17:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 16:17:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:17:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 16:17:31,442 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 16:17:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:31,442 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 16:17:31,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 16:17:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:31,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:31,443 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:31,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:31,643 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:31,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-15 16:17:31,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:31,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278576758] [2020-10-15 16:17:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278576758] [2020-10-15 16:17:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689708338] [2020-10-15 16:17:31,762 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 16:17:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:31,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030917121] [2020-10-15 16:17:31,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:31,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:31,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:31,975 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 16:17:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:32,162 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 16:17:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:32,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:32,164 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:32,164 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:17:32,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:17:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 16:17:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:17:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 16:17:32,169 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 16:17:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:32,169 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 16:17:32,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 16:17:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:32,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:32,170 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:32,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:32,381 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-15 16:17:32,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:32,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645254311] [2020-10-15 16:17:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645254311] [2020-10-15 16:17:32,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558667612] [2020-10-15 16:17:32,505 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 16:17:32,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:32,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:32,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:32,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695711870] [2020-10-15 16:17:32,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:32,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:32,745 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 16:17:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:32,964 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 16:17:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:32,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:32,965 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:17:32,966 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:17:32,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:17:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 16:17:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:17:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 16:17:32,969 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 16:17:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:32,970 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 16:17:32,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 16:17:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:32,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:32,970 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:33,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 16:17:33,171 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-15 16:17:33,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:33,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079052038] [2020-10-15 16:17:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079052038] [2020-10-15 16:17:33,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678634084] [2020-10-15 16:17:33,280 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 16:17:33,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:33,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:33,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:33,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229705565] [2020-10-15 16:17:33,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:33,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:33,509 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 16:17:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:33,762 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:17:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:33,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:33,764 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:17:33,764 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:17:33,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:17:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 16:17:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:17:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 16:17:33,769 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 16:17:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:33,770 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 16:17:33,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 16:17:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:33,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:33,770 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:33,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:17:33,978 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-15 16:17:33,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:33,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607184741] [2020-10-15 16:17:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607184741] [2020-10-15 16:17:34,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755275785] [2020-10-15 16:17:34,102 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 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 16:17:34,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:34,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:34,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964392207] [2020-10-15 16:17:34,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:34,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:34,327 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 16:17:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:34,384 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 16:17:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:17:34,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:34,386 INFO L225 Difference]: With dead ends: 188 [2020-10-15 16:17:34,386 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:17:34,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:17:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 16:17:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 16:17:34,389 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 16:17:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:34,390 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 16:17:34,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 16:17:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:34,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:34,390 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:34,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:17:34,591 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-15 16:17:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524297939] [2020-10-15 16:17:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524297939] [2020-10-15 16:17:34,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472818926] [2020-10-15 16:17:34,714 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 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 16:17:34,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:34,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:34,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101762059] [2020-10-15 16:17:34,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:34,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:34,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:34,955 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 16:17:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:35,194 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 16:17:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:35,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:35,196 INFO L225 Difference]: With dead ends: 199 [2020-10-15 16:17:35,196 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:17:35,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:17:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 16:17:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:17:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:17:35,200 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:17:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:35,200 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:17:35,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:17:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:35,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:35,200 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:35,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:17:35,401 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-15 16:17:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:35,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634807110] [2020-10-15 16:17:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:35,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634807110] [2020-10-15 16:17:35,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437894937] [2020-10-15 16:17:35,522 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 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 16:17:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:35,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:35,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:35,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834511230] [2020-10-15 16:17:35,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:35,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:35,792 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:36,102 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:17:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:36,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:36,104 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:17:36,104 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:17:36,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:17:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 16:17:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:17:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 16:17:36,107 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 16:17:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:36,107 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 16:17:36,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 16:17:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:36,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:36,108 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:36,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:17:36,309 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-15 16:17:36,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:36,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494715954] [2020-10-15 16:17:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494715954] [2020-10-15 16:17:36,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129396093] [2020-10-15 16:17:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:17:36,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:36,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747332451] [2020-10-15 16:17:36,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:36,692 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 16:17:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:37,016 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:17:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:37,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:37,018 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:17:37,018 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:17:37,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:17:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 16:17:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:17:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:17:37,021 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:17:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:37,021 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:17:37,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:17:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:37,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:37,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:37,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 16:17:37,231 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-15 16:17:37,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:37,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833357209] [2020-10-15 16:17:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:37,351 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 16:17:37,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833357209] [2020-10-15 16:17:37,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148967943] [2020-10-15 16:17:37,352 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 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 16:17:37,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:17:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:41,339 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 16:17:41,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:41,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:41,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468985055] [2020-10-15 16:17:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:41,340 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:45,549 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:45,825 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:17:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:45,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:45,828 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:45,828 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:45,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 16:17:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:17:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:45,832 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:45,833 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:45,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:45,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:45,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:46,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:46,045 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-15 16:17:46,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:46,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254383649] [2020-10-15 16:17:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:46,172 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 16:17:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254383649] [2020-10-15 16:17:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100593439] [2020-10-15 16:17:46,173 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 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 16:17:46,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:46,509 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 16:17:46,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:46,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:46,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339737136] [2020-10-15 16:17:46,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:46,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:46,511 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:46,913 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 16:17:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:46,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:46,915 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:46,915 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:46,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 16:17:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:17:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 16:17:46,917 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 16:17:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:46,918 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 16:17:46,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 16:17:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:46,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:46,918 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:47,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:47,119 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-15 16:17:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:47,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202727446] [2020-10-15 16:17:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202727446] [2020-10-15 16:17:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371356496] [2020-10-15 16:17:47,241 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 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 16:17:47,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:47,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:47,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173074576] [2020-10-15 16:17:47,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:47,473 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 16:17:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:47,847 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:17:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:47,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:47,848 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:47,848 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:47,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 16:17:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:47,850 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:47,851 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:47,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:47,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:47,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:48,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:48,052 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-15 16:17:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:48,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255748511] [2020-10-15 16:17:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:48,170 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 16:17:48,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255748511] [2020-10-15 16:17:48,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087621642] [2020-10-15 16:17:48,171 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 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 16:17:48,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:17:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:48,403 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 16:17:48,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:48,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121336350] [2020-10-15 16:17:48,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:48,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:48,405 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:48,809 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 16:17:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:48,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:48,810 INFO L225 Difference]: With dead ends: 224 [2020-10-15 16:17:48,810 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:17:48,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:17:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 16:17:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:48,815 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:48,815 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:48,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:48,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:48,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:49,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:49,025 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-15 16:17:49,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603968323] [2020-10-15 16:17:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:49,151 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 16:17:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603968323] [2020-10-15 16:17:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118613156] [2020-10-15 16:17:49,151 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 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 16:17:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:49,378 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 16:17:49,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:49,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:49,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857317132] [2020-10-15 16:17:49,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:49,380 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:49,718 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 16:17:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:49,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:49,719 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:49,719 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:49,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:17:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:49,722 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:49,722 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:49,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:49,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:49,723 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:49,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:49,923 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-15 16:17:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:49,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225646946] [2020-10-15 16:17:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225646946] [2020-10-15 16:17:50,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149105163] [2020-10-15 16:17:50,048 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 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 16:17:50,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:50,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:50,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598336752] [2020-10-15 16:17:50,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:50,267 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:50,555 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 16:17:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:50,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:50,556 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:17:50,556 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:17:50,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:17:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 16:17:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:17:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 16:17:50,560 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 16:17:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:50,560 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 16:17:50,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 16:17:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:50,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:50,560 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:50,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:17:50,761 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-15 16:17:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433495718] [2020-10-15 16:17:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:50,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433495718] [2020-10-15 16:17:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513062708] [2020-10-15 16:17:50,905 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 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 16:17:50,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:51,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:51,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:51,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902322173] [2020-10-15 16:17:51,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:51,129 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 16:17:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:51,430 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 16:17:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:51,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:51,432 INFO L225 Difference]: With dead ends: 207 [2020-10-15 16:17:51,432 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 16:17:51,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 16:17:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 16:17:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 16:17:51,438 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 16:17:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:51,438 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 16:17:51,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 16:17:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:51,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:51,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:51,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:17:51,642 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-15 16:17:51,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:51,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285017646] [2020-10-15 16:17:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:51,774 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 16:17:51,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285017646] [2020-10-15 16:17:51,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014335513] [2020-10-15 16:17:51,775 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 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 16:17:51,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:51,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:52,012 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 16:17:52,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:52,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:52,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197676191] [2020-10-15 16:17:52,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:52,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:52,013 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 16:17:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:52,347 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 16:17:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:52,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:52,348 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:17:52,348 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:17:52,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:17:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 16:17:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:17:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 16:17:52,352 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 16:17:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:52,352 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 16:17:52,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 16:17:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:52,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:52,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:52,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:17:52,554 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-15 16:17:52,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029730032] [2020-10-15 16:17:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:52,682 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 16:17:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029730032] [2020-10-15 16:17:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350258504] [2020-10-15 16:17:52,683 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 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 16:17:52,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:52,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:52,982 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 16:17:52,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:52,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725324521] [2020-10-15 16:17:52,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:52,984 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:53,444 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 16:17:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:53,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:53,446 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:17:53,446 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:17:53,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:17:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 16:17:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 16:17:53,450 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 16:17:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 16:17:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 16:17:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:53,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:53,451 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:53,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:17:53,658 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-15 16:17:53,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:53,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629094084] [2020-10-15 16:17:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:53,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629094084] [2020-10-15 16:17:53,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427519862] [2020-10-15 16:17:53,798 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 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 16:17:53,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:54,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:54,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593047354] [2020-10-15 16:17:54,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:54,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:54,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:54,028 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:54,370 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 16:17:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:54,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:54,371 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:17:54,371 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:17:54,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:17:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 16:17:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 16:17:54,375 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 16:17:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:54,376 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 16:17:54,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 16:17:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:54,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:54,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:54,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:54,577 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-15 16:17:54,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:54,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851327528] [2020-10-15 16:17:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:54,720 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 16:17:54,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851327528] [2020-10-15 16:17:54,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798072641] [2020-10-15 16:17:54,721 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 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 16:17:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:54,973 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 16:17:54,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:54,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:54,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361248244] [2020-10-15 16:17:54,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:54,974 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 16:17:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:55,312 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 16:17:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:55,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:55,314 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:17:55,314 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:17:55,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:17:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 16:17:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 16:17:55,318 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 16:17:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:55,318 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 16:17:55,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 16:17:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:55,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:55,319 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:55,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:55,519 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-15 16:17:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:55,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460437960] [2020-10-15 16:17:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460437960] [2020-10-15 16:17:55,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994872578] [2020-10-15 16:17:55,680 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 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 16:17:55,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:55,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:55,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:55,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066507673] [2020-10-15 16:17:55,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:55,916 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:56,155 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 16:17:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:56,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:56,156 INFO L225 Difference]: With dead ends: 203 [2020-10-15 16:17:56,157 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 16:17:56,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 16:17:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 16:17:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:17:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 16:17:56,160 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 16:17:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:56,160 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 16:17:56,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 16:17:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:56,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:56,161 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:56,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 16:17:56,361 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:56,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-15 16:17:56,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:56,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108574885] [2020-10-15 16:17:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108574885] [2020-10-15 16:17:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487993795] [2020-10-15 16:17:56,548 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 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 16:17:56,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:56,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:56,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356324916] [2020-10-15 16:17:56,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:56,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:56,765 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:56,834 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:17:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:56,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:56,836 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:56,836 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:56,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 16:17:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 16:17:56,840 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 16:17:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:56,840 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 16:17:56,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 16:17:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:56,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:56,840 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:57,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:57,041 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-15 16:17:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:57,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836609779] [2020-10-15 16:17:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:57,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836609779] [2020-10-15 16:17:57,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340530254] [2020-10-15 16:17:57,250 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 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 16:17:57,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:57,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:57,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:57,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:57,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:57,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738477625] [2020-10-15 16:17:57,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:57,519 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 16:17:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:57,807 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 16:17:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:57,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:57,809 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:17:57,809 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:17:57,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:17:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 16:17:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:17:57,813 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:17:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:57,813 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:17:57,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:17:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:57,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:57,814 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:58,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:58,024 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-15 16:17:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:58,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147267926] [2020-10-15 16:17:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:58,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147267926] [2020-10-15 16:17:58,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964500987] [2020-10-15 16:17:58,186 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 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 16:17:58,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:58,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:58,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41096570] [2020-10-15 16:17:58,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:58,487 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:17:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:58,838 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:17:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:58,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:58,839 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:17:58,839 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:17:58,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:17:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 16:17:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 16:17:58,841 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 16:17:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:58,842 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 16:17:58,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 16:17:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:58,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:58,842 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:59,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:59,043 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-15 16:17:59,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:59,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113787659] [2020-10-15 16:17:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:59,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113787659] [2020-10-15 16:17:59,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899789985] [2020-10-15 16:17:59,178 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 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 16:17:59,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:59,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:59,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:59,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503628525] [2020-10-15 16:17:59,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:59,475 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 16:17:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:59,967 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:17:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:59,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:59,968 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:17:59,968 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:17:59,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:17:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 16:17:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:17:59,971 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:17:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:59,971 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:17:59,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:17:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:59,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:59,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:00,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 16:18:00,175 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-15 16:18:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:00,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103714501] [2020-10-15 16:18:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:00,343 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 16:18:00,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103714501] [2020-10-15 16:18:00,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997256137] [2020-10-15 16:18:00,344 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 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 16:18:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:03,538 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 16:18:03,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:03,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933737850] [2020-10-15 16:18:03,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:03,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:03,539 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:18:07,799 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:08,159 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 16:18:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:08,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:08,161 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:18:08,161 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:18:08,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 16:18:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:18:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 16:18:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:08,165 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:08,165 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:08,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:08,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:08,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:08,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:18:08,366 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-10-15 16:18:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:08,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478821083] [2020-10-15 16:18:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478821083] [2020-10-15 16:18:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850181578] [2020-10-15 16:18:08,509 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 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 16:18:08,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:08,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:08,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:08,830 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 16:18:08,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:08,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710145534] [2020-10-15 16:18:08,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:08,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:08,831 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:09,330 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 16:18:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:09,331 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:09,332 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:18:09,332 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:18:09,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:18:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:18:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:18:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 16:18:09,335 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 16:18:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:09,335 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 16:18:09,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 16:18:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:09,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:09,336 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:09,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:18:09,537 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-10-15 16:18:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:09,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580514326] [2020-10-15 16:18:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:09,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580514326] [2020-10-15 16:18:09,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082023875] [2020-10-15 16:18:09,678 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 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 16:18:09,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:09,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:09,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:09,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195695351] [2020-10-15 16:18:09,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:09,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:09,920 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 16:18:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:10,396 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 16:18:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:10,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:10,397 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:18:10,397 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:18:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:18:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 16:18:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:10,401 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:10,401 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:10,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:10,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:10,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:10,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:18:10,603 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-10-15 16:18:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:10,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701365918] [2020-10-15 16:18:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:10,728 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 16:18:10,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701365918] [2020-10-15 16:18:10,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978230995] [2020-10-15 16:18:10,729 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 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 16:18:10,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:10,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:10,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396698051] [2020-10-15 16:18:10,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:10,957 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:11,677 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 16:18:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:11,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:11,680 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:18:11,680 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:18:11,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:18:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:18:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:11,686 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:11,687 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:11,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:11,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:11,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:11,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:18:11,900 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-10-15 16:18:11,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:11,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063286561] [2020-10-15 16:18:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:12,064 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 16:18:12,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063286561] [2020-10-15 16:18:12,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437701536] [2020-10-15 16:18:12,065 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 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 16:18:12,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:12,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:12,329 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 16:18:12,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:12,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067451035] [2020-10-15 16:18:12,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:12,331 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:12,767 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 16:18:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:12,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:12,769 INFO L225 Difference]: With dead ends: 234 [2020-10-15 16:18:12,769 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:18:12,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:18:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 16:18:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:12,773 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:12,773 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:12,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:12,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:12,773 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:12,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 16:18:12,982 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-10-15 16:18:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:12,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463567790] [2020-10-15 16:18:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463567790] [2020-10-15 16:18:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835180380] [2020-10-15 16:18:13,101 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 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 16:18:13,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:13,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:13,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:13,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:13,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641526496] [2020-10-15 16:18:13,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:13,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:13,324 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:13,700 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 16:18:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:13,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:13,702 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:18:13,702 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:18:13,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:18:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:18:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 16:18:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:18:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 16:18:13,711 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 16:18:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:13,711 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 16:18:13,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 16:18:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:13,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:13,712 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:13,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:13,912 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-10-15 16:18:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:13,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521547958] [2020-10-15 16:18:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:14,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521547958] [2020-10-15 16:18:14,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510315544] [2020-10-15 16:18:14,096 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 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 16:18:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:14,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:14,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:14,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243617857] [2020-10-15 16:18:14,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:14,446 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 16:18:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:14,606 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 16:18:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:18:14,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:14,607 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:18:14,607 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:18:14,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:18:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:18:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 16:18:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 16:18:14,611 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 16:18:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:14,611 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 16:18:14,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 16:18:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:14,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:14,611 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:14,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:14,818 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-10-15 16:18:14,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:14,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282787227] [2020-10-15 16:18:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282787227] [2020-10-15 16:18:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948609411] [2020-10-15 16:18:14,974 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 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 16:18:15,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:15,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511879370] [2020-10-15 16:18:15,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:15,216 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 16:18:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:15,570 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 16:18:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:15,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:15,571 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:18:15,572 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:18:15,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:18:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:18:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 16:18:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:18:15,575 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:18:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:15,575 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:18:15,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:18:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:15,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:15,576 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:15,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:15,776 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-10-15 16:18:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:15,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947665445] [2020-10-15 16:18:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947665445] [2020-10-15 16:18:15,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774458504] [2020-10-15 16:18:15,932 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 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 16:18:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:16,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:16,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:16,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045572766] [2020-10-15 16:18:16,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:16,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:16,236 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:16,660 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 16:18:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:16,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:16,662 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:16,662 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:16,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:18:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 16:18:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:18:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 16:18:16,666 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 16:18:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:16,666 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 16:18:16,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 16:18:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:16,666 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:16,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:16,867 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-10-15 16:18:16,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:16,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514152815] [2020-10-15 16:18:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:16,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514152815] [2020-10-15 16:18:16,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192784399] [2020-10-15 16:18:16,994 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 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 16:18:17,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:17,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:17,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070729269] [2020-10-15 16:18:17,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:17,279 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 16:18:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:17,792 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 16:18:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:17,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:17,793 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:18:17,793 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:18:17,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:18:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 16:18:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:18:17,798 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:18:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:17,798 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:18:17,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:18:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:17,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:17,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:18,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:18,008 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-10-15 16:18:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:18,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951099830] [2020-10-15 16:18:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:18,140 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 16:18:18,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951099830] [2020-10-15 16:18:18,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10755218] [2020-10-15 16:18:18,141 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 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 16:18:18,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:22,934 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 16:18:22,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:22,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:22,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559357341] [2020-10-15 16:18:22,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:22,936 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:27,221 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:27,591 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 16:18:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:27,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:27,592 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:18:27,593 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:18:27,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:18:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:18:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:18:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 16:18:27,596 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 16:18:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:27,597 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 16:18:27,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 16:18:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:27,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:27,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:27,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:27,798 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-10-15 16:18:27,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:27,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985967163] [2020-10-15 16:18:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:27,922 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 16:18:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985967163] [2020-10-15 16:18:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847616090] [2020-10-15 16:18:27,922 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 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 16:18:27,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:27,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:27,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:27,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:28,224 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 16:18:28,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:28,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912572337] [2020-10-15 16:18:28,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:28,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:28,226 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 16:18:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:28,756 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 16:18:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:28,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:28,757 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:18:28,757 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:18:28,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:18:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 16:18:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:18:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 16:18:28,761 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 16:18:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:28,761 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 16:18:28,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 16:18:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:28,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:28,762 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:28,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 16:18:28,962 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-10-15 16:18:28,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:28,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149384253] [2020-10-15 16:18:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149384253] [2020-10-15 16:18:29,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803564991] [2020-10-15 16:18:29,120 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 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 16:18:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:29,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682716419] [2020-10-15 16:18:29,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:29,369 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 16:18:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:29,522 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 16:18:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:18:29,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:29,524 INFO L225 Difference]: With dead ends: 204 [2020-10-15 16:18:29,524 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 16:18:29,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:18:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 16:18:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 16:18:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 16:18:29,527 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 16:18:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:29,527 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 16:18:29,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 16:18:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:29,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:29,528 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:29,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:29,728 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-10-15 16:18:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:29,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290623954] [2020-10-15 16:18:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290623954] [2020-10-15 16:18:29,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401004399] [2020-10-15 16:18:29,866 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 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 16:18:29,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:30,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:30,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040990860] [2020-10-15 16:18:30,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:30,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:30,104 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 16:18:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:30,462 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 16:18:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:30,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:30,463 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:18:30,463 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:18:30,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:18:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:18:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 16:18:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 16:18:30,467 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 16:18:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:30,467 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 16:18:30,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 16:18:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:30,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:30,468 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:30,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:18:30,669 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-10-15 16:18:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787238305] [2020-10-15 16:18:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787238305] [2020-10-15 16:18:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939158320] [2020-10-15 16:18:30,797 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 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 16:18:30,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:31,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175288343] [2020-10-15 16:18:31,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:31,107 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 16:18:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:31,579 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 16:18:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:31,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:31,581 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:18:31,581 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:18:31,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:18:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 16:18:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:18:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 16:18:31,584 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 16:18:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 16:18:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 16:18:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:31,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:31,585 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:31,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:31,786 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:31,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-10-15 16:18:31,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:31,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270926964] [2020-10-15 16:18:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270926964] [2020-10-15 16:18:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656104221] [2020-10-15 16:18:31,925 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 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 16:18:31,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:31,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:31,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:32,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:32,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69751861] [2020-10-15 16:18:32,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:32,172 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 16:18:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:32,452 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 16:18:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:18:32,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:32,454 INFO L225 Difference]: With dead ends: 200 [2020-10-15 16:18:32,455 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 16:18:32,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:18:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 16:18:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 16:18:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 16:18:32,460 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 16:18:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:32,461 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 16:18:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 16:18:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:32,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:32,462 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:32,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:32,662 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-10-15 16:18:32,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:32,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629190114] [2020-10-15 16:18:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:32,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629190114] [2020-10-15 16:18:32,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594605565] [2020-10-15 16:18:32,784 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 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 16:18:32,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:33,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247115101] [2020-10-15 16:18:33,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:33,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:33,056 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:33,479 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 16:18:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:33,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:33,481 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:18:33,481 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:18:33,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:18:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 16:18:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 16:18:33,485 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 16:18:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:33,485 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 16:18:33,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 16:18:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:33,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:33,486 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:33,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 16:18:33,695 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-10-15 16:18:33,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:33,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687017421] [2020-10-15 16:18:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687017421] [2020-10-15 16:18:33,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122426866] [2020-10-15 16:18:33,821 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 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 16:18:33,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:18:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:33,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:18:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760728206] [2020-10-15 16:18:33,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:18:33,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:18:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:18:33,912 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 16:18:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:34,113 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 16:18:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:18:34,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:18:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:34,116 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:18:34,117 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:18:34,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:18:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:18:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 16:18:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:34,120 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:34,121 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:34,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:18:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:34,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:34,121 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:34,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:34,322 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-10-15 16:18:34,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:34,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105464576] [2020-10-15 16:18:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:34,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105464576] [2020-10-15 16:18:34,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303802755] [2020-10-15 16:18:34,436 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 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 16:18:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:34,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:34,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:34,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334288050] [2020-10-15 16:18:34,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:34,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:34,704 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:35,255 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 16:18:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:35,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:35,256 INFO L225 Difference]: With dead ends: 226 [2020-10-15 16:18:35,256 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:18:35,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:18:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 16:18:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:18:35,260 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:18:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:35,260 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:18:35,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:18:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:35,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:35,260 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:35,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:35,461 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:35,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-10-15 16:18:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:35,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766102689] [2020-10-15 16:18:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766102689] [2020-10-15 16:18:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421022827] [2020-10-15 16:18:35,576 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 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 16:18:35,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:35,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196237694] [2020-10-15 16:18:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:35,852 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:18:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:36,350 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:18:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:18:36,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:36,352 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:18:36,352 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:18:36,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:18:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 16:18:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:36,356 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:36,356 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:36,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:36,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:36,357 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:36,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:36,557 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-10-15 16:18:36,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:36,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794126255] [2020-10-15 16:18:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:36,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794126255] [2020-10-15 16:18:36,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039567787] [2020-10-15 16:18:36,674 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 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 16:18:36,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:36,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:36,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:36,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:36,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:36,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748843594] [2020-10-15 16:18:36,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:36,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:36,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:36,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:36,958 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:37,694 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 16:18:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:18:37,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:37,696 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:18:37,696 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:18:37,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:18:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 16:18:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:37,700 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:37,700 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:37,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:37,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:37,701 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:37,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:37,901 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:37,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-10-15 16:18:37,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:37,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761569566] [2020-10-15 16:18:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:38,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761569566] [2020-10-15 16:18:38,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262316744] [2020-10-15 16:18:38,023 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 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 16:18:38,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:38,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:38,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:38,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:38,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180376806] [2020-10-15 16:18:38,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:38,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:38,269 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:38,850 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 16:18:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:38,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:38,852 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:18:38,852 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:38,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:18:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:18:38,856 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:18:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:38,856 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:18:38,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:18:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:38,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:38,856 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:39,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:39,057 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:39,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-10-15 16:18:39,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:39,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210044703] [2020-10-15 16:18:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210044703] [2020-10-15 16:18:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410538586] [2020-10-15 16:18:39,176 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 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 16:18:39,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:39,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:39,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:39,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:39,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310266459] [2020-10-15 16:18:39,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:39,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:39,494 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:18:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:40,220 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 16:18:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:40,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:40,222 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:40,222 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:40,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 16:18:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:18:40,230 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:18:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:40,231 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:18:40,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:18:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:40,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:40,231 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:40,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:40,442 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-10-15 16:18:40,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:40,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774622304] [2020-10-15 16:18:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:40,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774622304] [2020-10-15 16:18:40,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167142962] [2020-10-15 16:18:40,563 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 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 16:18:40,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:40,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092178866] [2020-10-15 16:18:40,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:40,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:40,879 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:18:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:41,603 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 16:18:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:41,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:41,604 INFO L225 Difference]: With dead ends: 252 [2020-10-15 16:18:41,604 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 16:18:41,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:18:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 16:18:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 16:18:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:41,607 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:41,608 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:41,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:41,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:41,608 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:41,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:18:41,809 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-10-15 16:18:41,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:41,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958389547] [2020-10-15 16:18:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:41,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958389547] [2020-10-15 16:18:41,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524007744] [2020-10-15 16:18:41,944 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 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 16:18:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:42,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:42,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:42,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:42,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:42,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325092450] [2020-10-15 16:18:42,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:42,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:42,311 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:43,208 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 16:18:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:18:43,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:43,209 INFO L225 Difference]: With dead ends: 258 [2020-10-15 16:18:43,209 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:18:43,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:18:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:18:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:18:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:43,212 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:43,213 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:43,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:43,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:43,213 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:43,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 16:18:43,416 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-10-15 16:18:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:43,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383593002] [2020-10-15 16:18:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383593002] [2020-10-15 16:18:43,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740989098] [2020-10-15 16:18:43,550 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 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 16:18:43,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:43,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:45,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:45,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:45,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:45,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947125113] [2020-10-15 16:18:45,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:45,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:45,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:45,930 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:50,255 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 16:18:54,551 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 16:18:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:55,662 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 16:18:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:55,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:55,664 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:18:55,664 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 16:18:55,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:18:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 16:18:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 16:18:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 16:18:55,668 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 16:18:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:55,669 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 16:18:55,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 16:18:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:55,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:55,669 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:55,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 16:18:55,875 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-10-15 16:18:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:55,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144111174] [2020-10-15 16:18:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:56,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144111174] [2020-10-15 16:18:56,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928291085] [2020-10-15 16:18:56,010 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 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 16:18:56,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:56,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:56,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:58,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:58,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:18:58,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085467708] [2020-10-15 16:18:58,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:18:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:18:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:18:58,451 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 18 states. [2020-10-15 16:19:01,180 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 16:19:09,220 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-15 16:19:23,625 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-15 16:19:33,143 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 16:19:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:57,105 INFO L93 Difference]: Finished difference Result 283 states and 667 transitions. [2020-10-15 16:19:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:57,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:19:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:57,108 INFO L225 Difference]: With dead ends: 283 [2020-10-15 16:19:57,108 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 16:19:57,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=391, Invalid=930, Unknown=11, NotChecked=0, Total=1332 [2020-10-15 16:19:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 16:19:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 160. [2020-10-15 16:19:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:19:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 16:19:57,111 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 16:19:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:57,112 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 16:19:57,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:19:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 16:19:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:57,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:57,112 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:57,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:57,313 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:57,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-10-15 16:19:57,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:57,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008850143] [2020-10-15 16:19:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:57,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008850143] [2020-10-15 16:19:57,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942146128] [2020-10-15 16:19:57,447 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 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 16:19:57,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:57,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:57,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:57,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:57,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722871920] [2020-10-15 16:19:57,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:57,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:57,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:57,798 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 16:19:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:58,360 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 16:19:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:19:58,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:58,361 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:19:58,361 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:19:58,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:19:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 16:19:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 16:19:58,364 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 16:19:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:58,364 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 16:19:58,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 16:19:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:58,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:58,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:58,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:58,566 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-10-15 16:19:58,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:58,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549384025] [2020-10-15 16:19:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:58,701 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 16:19:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549384025] [2020-10-15 16:19:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460560010] [2020-10-15 16:19:58,702 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 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 16:19:58,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:05,458 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 16:20:05,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:05,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395954529] [2020-10-15 16:20:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:05,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:20:05,459 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 16:20:09,846 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:20:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:16,380 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 16:20:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:16,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:16,382 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:20:16,382 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:20:16,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:20:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:20:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:20:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:20:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 16:20:16,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 16:20:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:16,386 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 16:20:16,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 16:20:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:16,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:16,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:16,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 16:20:16,588 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-10-15 16:20:16,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:16,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649357795] [2020-10-15 16:20:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:16,715 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 16:20:16,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649357795] [2020-10-15 16:20:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808257689] [2020-10-15 16:20:16,716 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 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 16:20:16,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:20:16,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:17,069 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 16:20:17,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:17,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:17,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415825283] [2020-10-15 16:20:17,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:17,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:17,072 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 16:20:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:17,761 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 16:20:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:17,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:17,763 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:20:17,764 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:20:17,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:20:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:20:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:20:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:20:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:20:17,767 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:20:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:17,767 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:20:17,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:20:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:17,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:17,768 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:17,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:17,969 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-10-15 16:20:17,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:17,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175558061] [2020-10-15 16:20:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175558061] [2020-10-15 16:20:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846719074] [2020-10-15 16:20:18,132 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 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 16:20:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:18,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:18,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:18,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138614052] [2020-10-15 16:20:18,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:18,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:18,490 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:20:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:19,429 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 16:20:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:20:19,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:19,431 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:20:19,431 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:20:19,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:20:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:20:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 16:20:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:20:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 16:20:19,435 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 16:20:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:19,435 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 16:20:19,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 16:20:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:19,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:19,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:19,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 16:20:19,636 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-10-15 16:20:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:19,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207185110] [2020-10-15 16:20:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:19,776 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 16:20:19,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207185110] [2020-10-15 16:20:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790588416] [2020-10-15 16:20:19,777 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 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 16:20:19,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:19,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:21,803 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 16:20:21,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:21,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493537162] [2020-10-15 16:20:21,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:21,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:21,804 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 16:20:26,314 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:20:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:41,131 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 16:20:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:20:41,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:41,132 INFO L225 Difference]: With dead ends: 264 [2020-10-15 16:20:41,133 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 16:20:41,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 16:20:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 16:20:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 16:20:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:20:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:20:41,141 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:20:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:41,141 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:20:41,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:20:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:41,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:41,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:41,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:41,343 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-10-15 16:20:41,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:41,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131021911] [2020-10-15 16:20:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:41,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131021911] [2020-10-15 16:20:41,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511077460] [2020-10-15 16:20:41,473 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 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 16:20:41,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:41,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:41,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099644177] [2020-10-15 16:20:41,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:41,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:41,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:41,814 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:20:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:42,760 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 16:20:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:20:42,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:42,762 INFO L225 Difference]: With dead ends: 255 [2020-10-15 16:20:42,762 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:20:42,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:20:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:20:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:20:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:20:42,766 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:20:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:42,766 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:20:42,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:20:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:42,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:42,766 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:42,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:42,967 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-10-15 16:20:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:42,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516598557] [2020-10-15 16:20:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:43,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516598557] [2020-10-15 16:20:43,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667209395] [2020-10-15 16:20:43,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:20:43,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:43,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:43,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:43,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:43,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:43,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111819202] [2020-10-15 16:20:43,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:43,450 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:20:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:44,688 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 16:20:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:20:44,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:44,690 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:20:44,691 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:20:44,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:20:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:20:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 16:20:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:20:44,694 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:20:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:44,694 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:20:44,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:20:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:44,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:44,695 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:44,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:20:44,896 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-10-15 16:20:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:44,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481772025] [2020-10-15 16:20:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:45,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481772025] [2020-10-15 16:20:45,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921332565] [2020-10-15 16:20:45,031 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 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 16:20:45,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:45,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:45,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:45,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:47,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:47,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:20:47,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413420917] [2020-10-15 16:20:47,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:20:47,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:20:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:20:47,318 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-10-15 16:20:52,228 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-15 16:20:54,413 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-15 16:21:00,779 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-15 16:21:10,973 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 16:21:33,740 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-15 16:22:07,229 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-15 16:22:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:37,653 INFO L93 Difference]: Finished difference Result 318 states and 744 transitions. [2020-10-15 16:22:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:37,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:22:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:37,656 INFO L225 Difference]: With dead ends: 318 [2020-10-15 16:22:37,656 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:22:37,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=513, Invalid=1276, Unknown=17, NotChecked=0, Total=1806 [2020-10-15 16:22:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:22:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 165. [2020-10-15 16:22:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:22:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:22:37,660 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:22:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:37,660 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:22:37,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:22:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:22:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:37,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:37,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:37,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:22:37,867 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-10-15 16:22:37,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:37,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344947621] [2020-10-15 16:22:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:38,016 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 16:22:38,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344947621] [2020-10-15 16:22:38,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688627242] [2020-10-15 16:22:38,017 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 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 16:22:38,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:22:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:40,551 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 16:22:40,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:40,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:40,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987923328] [2020-10-15 16:22:40,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:40,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:22:40,553 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:22:44,991 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:22:49,282 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:22:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:50,101 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 16:22:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:22:50,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:50,104 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:22:50,104 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:22:50,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:22:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:22:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 16:22:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:22:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:22:50,109 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:22:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:50,109 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:22:50,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:22:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:50,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:50,110 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:50,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:22:50,316 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-10-15 16:22:50,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:50,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335212525] [2020-10-15 16:22:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:50,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335212525] [2020-10-15 16:22:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203883591] [2020-10-15 16:22:50,506 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 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 16:22:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:54,862 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_554_43_92 Int) (v_~i~0_554 Int) (aux_div_v_~j~0_554_43 Int)) (let ((.cse0 (* 2 aux_div_aux_mod_v_~j~0_554_43_92)) (.cse1 (* 2 aux_div_v_~j~0_554_43))) (and (<= aux_div_v_~j~0_554_43 1) (<= v_~i~0_554 (+ .cse0 .cse1 3)) (<= c_~j~0 (+ .cse0 v_~i~0_554 2)) (<= (+ .cse0 .cse1 1) v_~i~0_554) (<= aux_div_aux_mod_v_~j~0_554_43_92 1) (<= c_~i~0 (+ v_~i~0_554 c_~j~0)) (<= (+ .cse1 c_~j~0) (* 2 v_~i~0_554))))) is different from true [2020-10-15 16:22:54,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:54,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:54,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:54,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:54,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738030271] [2020-10-15 16:22:54,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:54,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-15 16:22:54,948 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:22:55,408 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-15 16:22:59,565 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:23:07,947 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:23:23,118 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-15 16:23:26,322 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-15 16:23:35,238 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-15 16:23:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:40,418 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-10-15 16:23:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:23:40,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:40,422 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:23:40,422 INFO L226 Difference]: Without dead ends: 287 [2020-10-15 16:23:40,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=482, Invalid=1069, Unknown=13, NotChecked=76, Total=1640 [2020-10-15 16:23:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-15 16:23:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-10-15 16:23:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:23:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 16:23:40,426 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 16:23:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:40,426 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 16:23:40,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 16:23:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:40,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:40,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:40,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 16:23:40,627 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-10-15 16:23:40,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:40,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484428070] [2020-10-15 16:23:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:40,841 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 16:23:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484428070] [2020-10-15 16:23:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328568468] [2020-10-15 16:23:40,842 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 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 16:23:40,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:43,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:43,341 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 16:23:43,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:43,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851782979] [2020-10-15 16:23:43,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:23:43,343 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 16:23:44,321 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-15 16:23:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:45,893 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 16:23:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:23:45,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:45,897 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:23:45,897 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:23:45,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 16:23:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:23:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 16:23:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:23:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:23:45,901 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:23:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:45,902 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:23:45,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:23:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:45,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:45,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:46,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:23:46,105 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-10-15 16:23:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:46,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113440584] [2020-10-15 16:23:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:46,318 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 16:23:46,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113440584] [2020-10-15 16:23:46,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018182290] [2020-10-15 16:23:46,318 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 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 16:23:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:46,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:46,773 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 16:23:46,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:46,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:46,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542904328] [2020-10-15 16:23:46,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:46,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:46,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:46,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:46,774 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:23:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:47,587 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 16:23:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:23:47,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:47,589 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:23:47,589 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:23:47,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:23:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:23:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 16:23:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:23:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:23:47,593 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:23:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:47,593 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:23:47,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:23:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:47,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:47,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:47,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 16:23:47,795 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-10-15 16:23:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:47,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530340536] [2020-10-15 16:23:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:47,986 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 16:23:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530340536] [2020-10-15 16:23:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800933474] [2020-10-15 16:23:47,987 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 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 16:23:48,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:48,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:48,491 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 16:23:48,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:48,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324754873] [2020-10-15 16:23:48,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:48,492 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:23:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:49,815 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 16:23:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:23:49,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:49,818 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:23:49,818 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:23:49,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:23:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:23:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 16:23:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 16:23:49,821 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 16:23:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:49,821 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 16:23:49,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 16:23:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:49,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:49,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:50,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:50,023 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-10-15 16:23:50,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:50,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603046683] [2020-10-15 16:23:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:50,206 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 16:23:50,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603046683] [2020-10-15 16:23:50,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197874240] [2020-10-15 16:23:50,207 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 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 16:23:50,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:50,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:50,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:50,641 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 16:23:50,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:50,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:50,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511100547] [2020-10-15 16:23:50,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:50,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:50,642 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 16:23:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:52,619 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 16:23:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:23:52,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:52,622 INFO L225 Difference]: With dead ends: 288 [2020-10-15 16:23:52,622 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:23:52,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:23:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 16:23:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:23:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 16:23:52,626 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 16:23:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:52,626 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 16:23:52,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 16:23:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:52,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:52,626 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:52,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 16:23:52,827 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-10-15 16:23:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:52,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124386672] [2020-10-15 16:23:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:52,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124386672] [2020-10-15 16:23:52,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971289715] [2020-10-15 16:23:52,971 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 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 16:23:53,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:53,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:53,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:53,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:53,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869900262] [2020-10-15 16:23:53,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:53,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:53,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:53,383 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 16:23:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:54,238 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 16:23:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:23:54,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:54,240 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:23:54,240 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 16:23:54,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 16:23:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 16:23:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:54,243 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:54,244 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:54,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:54,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:54,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:54,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:54,445 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:54,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-10-15 16:23:54,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:54,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890553682] [2020-10-15 16:23:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:54,636 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 16:23:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890553682] [2020-10-15 16:23:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067485630] [2020-10-15 16:23:54,637 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 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 16:23:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:54,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:54,996 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 16:23:54,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:54,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626033082] [2020-10-15 16:23:54,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:54,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:54,998 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:23:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:55,767 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 16:23:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:23:55,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:55,770 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:23:55,770 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:23:55,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:23:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 16:23:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:55,774 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:55,774 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:55,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:55,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:55,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:55,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,975 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-10-15 16:23:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:55,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837632335] [2020-10-15 16:23:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:56,169 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 16:23:56,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837632335] [2020-10-15 16:23:56,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709014231] [2020-10-15 16:23:56,170 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 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 16:23:56,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:56,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:56,545 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 16:23:56,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:56,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:56,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739760454] [2020-10-15 16:23:56,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:56,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:56,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:56,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:56,547 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:23:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:57,230 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 16:23:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:23:57,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:57,233 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:23:57,233 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:23:57,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:23:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:23:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:23:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:57,237 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:57,237 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:57,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:57,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:57,238 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:57,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:57,439 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-10-15 16:23:57,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:57,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489402496] [2020-10-15 16:23:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:57,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489402496] [2020-10-15 16:23:57,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415329709] [2020-10-15 16:23:57,640 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 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 16:23:57,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:57,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:57,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:57,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69605681] [2020-10-15 16:23:57,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:57,970 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:23:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:58,657 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 16:23:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:23:58,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:58,660 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:23:58,660 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:23:58,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:23:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:23:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:23:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:23:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:23:58,664 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:23:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:58,664 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:23:58,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:23:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:58,665 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:58,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:23:58,865 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-10-15 16:23:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:58,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137073114] [2020-10-15 16:23:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:59,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137073114] [2020-10-15 16:23:59,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346362048] [2020-10-15 16:23:59,067 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 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 16:23:59,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:59,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:59,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:59,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982131421] [2020-10-15 16:23:59,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:59,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:59,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:59,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:59,392 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:24:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:00,718 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 16:24:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:00,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:00,722 INFO L225 Difference]: With dead ends: 261 [2020-10-15 16:24:00,722 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 16:24:00,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 16:24:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 16:24:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:24:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 16:24:00,725 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 16:24:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:00,725 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 16:24:00,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 16:24:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:00,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:00,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:00,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:00,927 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-10-15 16:24:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:00,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679600112] [2020-10-15 16:24:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:01,125 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 16:24:01,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679600112] [2020-10-15 16:24:01,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111092638] [2020-10-15 16:24:01,125 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 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 16:24:01,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:01,451 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 16:24:01,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:01,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:01,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114299212] [2020-10-15 16:24:01,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:01,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:01,453 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 16:24:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:02,745 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 16:24:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:02,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:02,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:02,748 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:02,748 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:02,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:24:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 16:24:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:24:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 16:24:02,752 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 16:24:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:02,752 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 16:24:02,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 16:24:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:02,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:02,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:02,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:24:02,960 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:02,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-10-15 16:24:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:02,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712177314] [2020-10-15 16:24:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:03,179 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 16:24:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712177314] [2020-10-15 16:24:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273520958] [2020-10-15 16:24:03,180 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 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 16:24:03,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:03,589 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 16:24:03,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:03,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:03,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390481610] [2020-10-15 16:24:03,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:03,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:03,590 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 16:24:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:04,769 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 16:24:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:24:04,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:04,773 INFO L225 Difference]: With dead ends: 253 [2020-10-15 16:24:04,773 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:24:04,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:24:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:24:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 16:24:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:24:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:24:04,776 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:24:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:24:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:24:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:04,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:04,777 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:04,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:24:04,978 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-10-15 16:24:04,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:04,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486272207] [2020-10-15 16:24:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486272207] [2020-10-15 16:24:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080058510] [2020-10-15 16:24:05,223 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 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 16:24:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:05,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:05,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:05,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108136844] [2020-10-15 16:24:05,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:05,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:05,666 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:24:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:07,251 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 16:24:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:07,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:07,254 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:24:07,254 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:24:07,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:24:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 16:24:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:24:07,257 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:24:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:07,258 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:24:07,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:24:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:07,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:07,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:07,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:07,459 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-10-15 16:24:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:07,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815859569] [2020-10-15 16:24:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:07,601 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 16:24:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815859569] [2020-10-15 16:24:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147537113] [2020-10-15 16:24:07,602 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 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 16:24:07,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:08,016 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 16:24:08,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:08,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477553865] [2020-10-15 16:24:08,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:08,018 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:24:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:09,598 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 16:24:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:24:09,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:09,601 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:09,601 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:09,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:09,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:24:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:24:09,605 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:24:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:09,605 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:24:09,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:24:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:09,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:09,605 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:09,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:24:09,814 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:09,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-10-15 16:24:09,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:09,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408940580] [2020-10-15 16:24:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:09,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408940580] [2020-10-15 16:24:09,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61375001] [2020-10-15 16:24:09,989 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 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 16:24:10,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:10,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:10,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463171733] [2020-10-15 16:24:10,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:10,330 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:24:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:11,854 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 16:24:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:11,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:11,857 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:11,857 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:11,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 16:24:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:11,861 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:11,862 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:11,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:11,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:11,862 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:12,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 16:24:12,063 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-10-15 16:24:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:12,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136186335] [2020-10-15 16:24:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:12,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136186335] [2020-10-15 16:24:12,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124067498] [2020-10-15 16:24:12,292 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 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 16:24:12,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:12,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:12,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:12,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:12,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:12,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47229557] [2020-10-15 16:24:12,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:12,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:12,681 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:14,020 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 16:24:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:14,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:14,024 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:24:14,024 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:24:14,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:24:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:24:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 16:24:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:14,028 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:14,028 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:14,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:14,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:14,029 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:14,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:14,230 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:14,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-10-15 16:24:14,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:14,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160592503] [2020-10-15 16:24:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:14,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160592503] [2020-10-15 16:24:14,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433729882] [2020-10-15 16:24:14,409 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 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 16:24:14,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:14,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:14,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:14,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:14,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780059398] [2020-10-15 16:24:14,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:14,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:14,773 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:16,587 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 16:24:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:24:16,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:16,590 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:24:16,590 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:24:16,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:24:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 16:24:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:24:16,594 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:24:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:16,594 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:24:16,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:24:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:16,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:16,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:16,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:16,795 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-10-15 16:24:16,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:16,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758584830] [2020-10-15 16:24:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:17,001 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 16:24:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758584830] [2020-10-15 16:24:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700468284] [2020-10-15 16:24:17,002 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 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 16:24:17,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:24:17,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:17,596 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 16:24:17,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:17,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293151077] [2020-10-15 16:24:17,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:17,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:17,597 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:24:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:19,337 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 16:24:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:24:19,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:19,340 INFO L225 Difference]: With dead ends: 284 [2020-10-15 16:24:19,340 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:24:19,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:24:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:24:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 16:24:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:19,344 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:19,345 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:19,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:19,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:19,345 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:19,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:19,546 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-10-15 16:24:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:19,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21822137] [2020-10-15 16:24:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21822137] [2020-10-15 16:24:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27096080] [2020-10-15 16:24:19,768 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 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 16:24:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:19,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:20,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:20,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:20,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:20,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487467448] [2020-10-15 16:24:20,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:20,189 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:22,217 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 16:24:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:24:22,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:22,220 INFO L225 Difference]: With dead ends: 289 [2020-10-15 16:24:22,220 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:24:22,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:24:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:24:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 16:24:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 16:24:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 16:24:22,229 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 16:24:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:22,230 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 16:24:22,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 16:24:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:22,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:22,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:22,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:22,431 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-10-15 16:24:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:22,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296063784] [2020-10-15 16:24:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:22,627 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 16:24:22,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296063784] [2020-10-15 16:24:22,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252685572] [2020-10-15 16:24:22,628 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:22,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:22,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:22,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:22,960 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 16:24:22,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:22,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559770703] [2020-10-15 16:24:22,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:22,962 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 16:24:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:25,418 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 16:24:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:25,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:25,421 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:24:25,421 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:24:25,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:24:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:24:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 16:24:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:24:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:24:25,425 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:24:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:25,426 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:24:25,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:24:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:25,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:25,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:25,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:25,627 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-10-15 16:24:25,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:25,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504176309] [2020-10-15 16:24:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:25,845 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 16:24:25,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504176309] [2020-10-15 16:24:25,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155681852] [2020-10-15 16:24:25,846 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:25,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:25,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:25,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:26,223 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 16:24:26,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:26,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:26,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884671243] [2020-10-15 16:24:26,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:26,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:26,225 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:24:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:27,351 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 16:24:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:27,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:27,353 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:27,353 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:27,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:24:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 16:24:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:27,357 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:27,357 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:27,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:27,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:27,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:27,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:24:27,565 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-10-15 16:24:27,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:27,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605153516] [2020-10-15 16:24:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:27,739 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 16:24:27,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605153516] [2020-10-15 16:24:27,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171976655] [2020-10-15 16:24:27,740 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:27,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:28,065 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 16:24:28,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:28,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:28,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493265900] [2020-10-15 16:24:28,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:28,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:28,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:28,067 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:29,745 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 16:24:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:29,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:29,749 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:29,749 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:29,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:24:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:24:29,754 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:24:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:29,754 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:24:29,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:24:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:29,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:29,755 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:29,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:24:29,955 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-10-15 16:24:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:29,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752717140] [2020-10-15 16:24:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:30,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752717140] [2020-10-15 16:24:30,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636678755] [2020-10-15 16:24:30,207 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:30,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:30,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:30,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:30,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:30,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:30,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684855385] [2020-10-15 16:24:30,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:30,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:30,600 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:24:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:32,701 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 16:24:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:32,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:32,705 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:24:32,706 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 16:24:32,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:24:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 16:24:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 16:24:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:24:32,709 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:24:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:32,709 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:24:32,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:24:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:32,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:32,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:32,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 16:24:32,911 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-10-15 16:24:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:32,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131949487] [2020-10-15 16:24:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:33,149 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 16:24:33,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131949487] [2020-10-15 16:24:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277305134] [2020-10-15 16:24:33,150 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:33,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:33,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:33,543 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 16:24:33,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:33,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:33,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519881787] [2020-10-15 16:24:33,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:33,544 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:24:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:35,563 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 16:24:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:24:35,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:35,567 INFO L225 Difference]: With dead ends: 298 [2020-10-15 16:24:35,567 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 16:24:35,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 16:24:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 16:24:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 16:24:35,571 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 16:24:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:35,572 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 16:24:35,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 16:24:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:35,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:35,572 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:35,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:24:35,773 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-10-15 16:24:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:35,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18294558] [2020-10-15 16:24:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:36,012 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 16:24:36,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18294558] [2020-10-15 16:24:36,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662738609] [2020-10-15 16:24:36,013 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:36,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:36,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:36,391 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 16:24:36,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:36,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:36,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839206881] [2020-10-15 16:24:36,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:36,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:36,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:36,393 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 16:24:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:38,493 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 16:24:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:24:38,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:38,497 INFO L225 Difference]: With dead ends: 291 [2020-10-15 16:24:38,497 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:24:38,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:24:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 16:24:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:38,502 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:38,502 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:38,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:38,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:38,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:38,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 16:24:38,704 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-10-15 16:24:38,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:38,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097138387] [2020-10-15 16:24:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:38,931 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 16:24:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097138387] [2020-10-15 16:24:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345803678] [2020-10-15 16:24:38,932 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:38,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:38,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:38,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:38,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:39,443 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 16:24:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:39,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376249060] [2020-10-15 16:24:39,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:39,444 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:41,370 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 16:24:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:41,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:41,374 INFO L225 Difference]: With dead ends: 265 [2020-10-15 16:24:41,374 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 16:24:41,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 16:24:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 16:24:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:41,378 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:41,378 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:41,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:41,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:41,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:41,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:41,579 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-10-15 16:24:41,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:41,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568917175] [2020-10-15 16:24:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:41,818 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 16:24:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568917175] [2020-10-15 16:24:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4115125] [2020-10-15 16:24:41,819 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:41,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:41,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:42,351 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 16:24:42,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:42,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:42,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86013921] [2020-10-15 16:24:42,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:42,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:42,353 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:44,692 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 16:24:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:24:44,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:44,696 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:44,696 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:44,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:24:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 16:24:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:24:44,702 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:24:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:44,702 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:24:44,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:24:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:44,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:44,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:44,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 16:24:44,903 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-10-15 16:24:44,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:44,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785258623] [2020-10-15 16:24:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:45,157 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 16:24:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785258623] [2020-10-15 16:24:45,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971843463] [2020-10-15 16:24:45,158 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:45,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:45,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:45,708 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 16:24:45,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:45,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:45,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558330360] [2020-10-15 16:24:45,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:45,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:45,709 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:24:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:48,721 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 16:24:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:48,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:48,725 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:24:48,725 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:24:48,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:24:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:24:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 16:24:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:48,728 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:48,728 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:48,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:48,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:48,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:48,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:48,930 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:48,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-10-15 16:24:48,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:48,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400797049] [2020-10-15 16:24:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:49,163 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 16:24:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400797049] [2020-10-15 16:24:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562124167] [2020-10-15 16:24:49,164 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:49,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:53,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:59,863 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 16:24:59,866 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 16:24:59,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:59,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:24:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254415] [2020-10-15 16:24:59,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:24:59,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:24:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 16:24:59,868 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 16:25:04,186 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 16:25:04,746 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-15 16:25:09,062 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:25:09,823 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-15 16:25:12,361 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-10-15 16:25:14,694 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:25:40,015 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 16:25:48,808 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 16:26:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:37,198 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 16:26:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:26:37,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:26:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:37,205 INFO L225 Difference]: With dead ends: 302 [2020-10-15 16:26:37,205 INFO L226 Difference]: Without dead ends: 295 [2020-10-15 16:26:37,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=556, Invalid=1408, Unknown=16, NotChecked=0, Total=1980 [2020-10-15 16:26:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-15 16:26:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 166. [2020-10-15 16:26:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:26:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 16:26:37,209 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 16:26:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:37,209 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 16:26:37,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:26:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 16:26:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:37,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:37,209 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:37,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:37,410 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-10-15 16:26:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:37,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901175826] [2020-10-15 16:26:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901175826] [2020-10-15 16:26:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30518710] [2020-10-15 16:26:37,655 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:37,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:38,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:38,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:38,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727070335] [2020-10-15 16:26:38,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:38,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:38,101 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 16:26:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:38,801 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 16:26:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:38,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:38,803 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:26:38,803 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 16:26:38,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:38,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 16:26:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 16:26:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:26:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:26:38,807 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:26:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:38,807 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:26:38,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:26:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:38,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:38,807 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:39,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:39,010 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:39,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:39,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-10-15 16:26:39,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:39,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450988871] [2020-10-15 16:26:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:39,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450988871] [2020-10-15 16:26:39,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310900504] [2020-10-15 16:26:39,263 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:39,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:26:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:39,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:39,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000245230] [2020-10-15 16:26:39,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:39,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:39,654 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:26:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:40,687 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 16:26:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:40,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:40,691 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:40,691 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:26:40,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:26:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 16:26:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:26:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 16:26:40,694 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 16:26:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:40,695 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 16:26:40,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 16:26:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:40,695 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:40,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:26:40,896 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-10-15 16:26:40,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:40,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665331053] [2020-10-15 16:26:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665331053] [2020-10-15 16:26:41,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740434121] [2020-10-15 16:26:41,148 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:41,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:41,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:41,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274858170] [2020-10-15 16:26:41,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:41,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:41,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:41,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:41,451 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 16:26:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:42,213 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:26:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:42,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:42,216 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:42,216 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:26:42,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:26:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:26:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:26:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:26:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:26:42,221 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:26:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:26:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:26:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:42,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:42,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:26:42,428 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-10-15 16:26:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:42,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160485220] [2020-10-15 16:26:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:42,686 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 16:26:42,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160485220] [2020-10-15 16:26:42,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224079794] [2020-10-15 16:26:42,686 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:42,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:26:42,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:42,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:43,212 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 16:26:43,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:43,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:43,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331512559] [2020-10-15 16:26:43,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:43,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:43,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:43,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:43,214 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:26:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:44,220 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 16:26:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:44,225 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:44,225 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:26:44,225 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:26:44,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:26:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 16:26:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:26:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 16:26:44,228 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 16:26:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:44,229 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 16:26:44,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 16:26:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:44,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:44,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:44,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:26:44,432 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-10-15 16:26:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:44,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441079547] [2020-10-15 16:26:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:44,714 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 16:26:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441079547] [2020-10-15 16:26:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865296863] [2020-10-15 16:26:44,715 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:44,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:47,416 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 16:26:47,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:47,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:47,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331291445] [2020-10-15 16:26:47,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:47,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:47,417 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 16:26:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:48,785 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:26:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:48,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:48,789 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:26:48,789 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:26:48,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:26:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 16:26:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:26:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 16:26:48,793 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 16:26:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:48,793 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 16:26:48,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 16:26:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:48,794 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:48,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:26:48,995 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-10-15 16:26:48,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:48,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736908] [2020-10-15 16:26:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736908] [2020-10-15 16:26:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444939084] [2020-10-15 16:26:49,150 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:49,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:49,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787299444] [2020-10-15 16:26:49,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:49,635 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 16:26:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:50,558 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 16:26:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:50,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:50,563 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:26:50,563 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:26:50,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:26:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 16:26:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:26:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 16:26:50,567 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 16:26:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:50,567 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 16:26:50,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 16:26:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:50,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:50,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:50,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:26:50,769 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-10-15 16:26:50,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:50,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355838418] [2020-10-15 16:26:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:51,060 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 16:26:51,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355838418] [2020-10-15 16:26:51,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295148663] [2020-10-15 16:26:51,061 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:51,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:51,453 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 16:26:51,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:51,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:51,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151826978] [2020-10-15 16:26:51,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:51,455 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 16:26:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:52,286 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 16:26:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:52,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:52,291 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:26:52,291 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:26:52,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:26:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:26:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 16:26:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:26:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 16:26:52,295 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 16:26:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:52,295 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 16:26:52,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 16:26:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:52,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:52,295 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:52,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 16:26:52,496 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-10-15 16:26:52,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:52,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484464520] [2020-10-15 16:26:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484464520] [2020-10-15 16:26:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325604913] [2020-10-15 16:26:52,859 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:53,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:53,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773998654] [2020-10-15 16:26:53,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:53,193 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 16:26:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:53,857 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 16:26:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:53,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:53,862 INFO L225 Difference]: With dead ends: 220 [2020-10-15 16:26:53,862 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:26:53,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:26:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:26:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 16:26:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:26:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 16:26:53,865 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 16:26:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:53,865 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 16:26:53,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 16:26:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:53,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:53,866 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:54,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:26:54,067 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-10-15 16:26:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740891424] [2020-10-15 16:26:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:54,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740891424] [2020-10-15 16:26:54,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197005033] [2020-10-15 16:26:54,300 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:54,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:54,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:54,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:54,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:54,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714054889] [2020-10-15 16:26:54,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:54,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:54,811 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 16:26:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:55,489 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:26:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:55,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:55,495 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:55,495 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:26:55,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:26:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:26:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:26:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 16:26:55,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 16:26:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:55,499 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 16:26:55,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 16:26:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:55,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:55,500 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:55,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 16:26:55,703 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-10-15 16:26:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:55,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438111024] [2020-10-15 16:26:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:55,930 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 16:26:55,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438111024] [2020-10-15 16:26:55,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625394886] [2020-10-15 16:26:55,931 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:55,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:26:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:56,458 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 16:26:56,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:56,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:56,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616603649] [2020-10-15 16:26:56,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:56,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:56,460 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 16:26:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:57,412 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 16:26:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:57,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:57,415 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:26:57,415 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:26:57,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:26:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 16:26:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:26:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 16:26:57,419 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 16:26:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:57,419 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 16:26:57,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 16:26:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:57,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:57,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:57,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:57,621 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-10-15 16:26:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:57,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292456937] [2020-10-15 16:26:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:57,777 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 16:26:57,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292456937] [2020-10-15 16:26:57,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043894980] [2020-10-15 16:26:57,778 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:57,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:00,459 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 16:27:00,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:00,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:00,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414774911] [2020-10-15 16:27:00,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:00,461 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 16:27:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:02,155 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 16:27:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:02,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:02,160 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:27:02,160 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:27:02,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:27:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:27:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 16:27:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:27:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 16:27:02,164 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 16:27:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:02,164 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 16:27:02,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 16:27:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:02,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:02,165 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:02,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:02,366 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-10-15 16:27:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:02,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917253305] [2020-10-15 16:27:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:02,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917253305] [2020-10-15 16:27:02,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930590785] [2020-10-15 16:27:02,639 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:02,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:03,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:03,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862544466] [2020-10-15 16:27:03,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:03,148 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 16:27:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:04,364 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:27:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:04,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:04,369 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:27:04,370 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:27:04,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:27:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 16:27:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:27:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 16:27:04,373 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 16:27:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:04,374 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 16:27:04,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 16:27:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:04,374 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:04,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:04,575 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-10-15 16:27:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:04,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463737468] [2020-10-15 16:27:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:04,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463737468] [2020-10-15 16:27:04,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172333661] [2020-10-15 16:27:04,821 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:04,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:27:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:05,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435756570] [2020-10-15 16:27:05,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:05,286 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 16:27:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:06,272 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 16:27:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:06,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:06,276 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:27:06,277 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:27:06,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:27:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:27:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 16:27:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:27:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:27:06,281 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:27:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:06,281 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:27:06,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:27:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:06,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:06,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:06,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:27:06,483 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-10-15 16:27:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:06,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175223275] [2020-10-15 16:27:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:06,741 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 16:27:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175223275] [2020-10-15 16:27:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681195332] [2020-10-15 16:27:06,742 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:07,208 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 16:27:07,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:07,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921396241] [2020-10-15 16:27:07,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:07,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:07,210 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:27:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:08,184 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 16:27:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:27:08,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:08,186 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:27:08,186 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:27:08,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:27:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 16:27:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:27:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:27:08,190 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:27:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:08,190 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:27:08,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:27:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:08,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:08,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:08,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:08,391 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-10-15 16:27:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:08,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982472965] [2020-10-15 16:27:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:08,609 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 16:27:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982472965] [2020-10-15 16:27:08,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808340937] [2020-10-15 16:27:08,610 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:08,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:09,212 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 16:27:09,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:09,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:09,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323324246] [2020-10-15 16:27:09,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:09,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:09,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:09,214 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:27:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:11,023 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 16:27:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:11,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:11,028 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:27:11,028 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:27:11,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:27:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:27:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 16:27:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:27:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:27:11,032 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:27:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:11,032 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:27:11,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:27:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:11,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:11,033 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:11,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:27:11,234 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-10-15 16:27:11,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:11,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917630882] [2020-10-15 16:27:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:11,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917630882] [2020-10-15 16:27:11,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280509441] [2020-10-15 16:27:11,477 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:11,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:27:11,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:11,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:12,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:12,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735342472] [2020-10-15 16:27:12,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:12,037 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:27:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:13,267 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 16:27:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:27:13,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:13,272 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:27:13,272 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:27:13,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:27:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:27:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 16:27:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:27:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 16:27:13,276 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 16:27:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:13,276 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 16:27:13,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 16:27:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:13,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:13,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:13,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:27:13,477 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:13,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-10-15 16:27:13,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:13,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890304031] [2020-10-15 16:27:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:13,726 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 16:27:13,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890304031] [2020-10-15 16:27:13,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135495316] [2020-10-15 16:27:13,727 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:13,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:13,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:14,183 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 16:27:14,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:14,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:14,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077949385] [2020-10-15 16:27:14,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:14,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:14,185 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 16:27:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:15,347 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 16:27:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:15,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:15,352 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:27:15,352 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:27:15,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:27:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:27:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 16:27:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:27:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:27:15,356 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:27:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:15,356 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:27:15,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:27:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:15,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:15,357 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:15,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:15,558 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:15,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-10-15 16:27:15,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:15,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242538026] [2020-10-15 16:27:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:15,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242538026] [2020-10-15 16:27:15,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764885669] [2020-10-15 16:27:15,811 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:15,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:27:15,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:16,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:16,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:16,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006079796] [2020-10-15 16:27:16,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:16,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:16,266 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:27:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:17,666 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 16:27:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:17,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:17,670 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:27:17,670 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:27:17,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:27:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:27:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 16:27:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:17,675 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:17,675 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:17,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:17,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:17,676 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:17,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:17,876 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-10-15 16:27:17,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315451691] [2020-10-15 16:27:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315451691] [2020-10-15 16:27:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118395003] [2020-10-15 16:27:18,118 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:18,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:27:18,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:18,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:18,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:18,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:18,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343281930] [2020-10-15 16:27:18,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:18,520 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:19,369 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 16:27:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:27:19,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:19,374 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:27:19,374 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:27:19,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:27:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 16:27:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:19,378 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:19,378 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:19,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:19,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:19,379 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:19,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 16:27:19,579 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:19,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-10-15 16:27:19,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:19,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846696731] [2020-10-15 16:27:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846696731] [2020-10-15 16:27:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656270022] [2020-10-15 16:27:19,826 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:20,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:27:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:20,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:20,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:20,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948097265] [2020-10-15 16:27:20,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:20,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:20,368 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:21,581 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-15 16:27:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:22,624 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 16:27:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:22,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:22,630 INFO L225 Difference]: With dead ends: 286 [2020-10-15 16:27:22,630 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 16:27:22,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:27:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 16:27:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 16:27:22,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:27:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:27:22,634 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:27:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:22,634 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:27:22,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:27:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:22,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:22,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:22,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:22,836 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-10-15 16:27:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:22,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126760552] [2020-10-15 16:27:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:23,128 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 16:27:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126760552] [2020-10-15 16:27:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970743429] [2020-10-15 16:27:23,129 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:23,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:23,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:23,694 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 16:27:23,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:23,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:23,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877202111] [2020-10-15 16:27:23,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:23,696 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:27:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:25,451 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 16:27:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:27:25,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:25,455 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:27:25,455 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:27:25,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:27:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:27:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 16:27:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:25,459 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:25,459 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:25,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:25,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:25,460 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:25,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 16:27:25,661 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-10-15 16:27:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:25,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233988392] [2020-10-15 16:27:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:25,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233988392] [2020-10-15 16:27:25,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974499232] [2020-10-15 16:27:25,933 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:27:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:26,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:26,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:26,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247770637] [2020-10-15 16:27:26,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:26,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:26,411 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:28,807 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 16:27:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:28,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:28,812 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:27:28,812 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:27:28,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:27:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:27:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 16:27:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:28,815 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:28,816 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:28,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:28,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:28,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:29,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:29,017 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:29,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-10-15 16:27:29,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:29,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867622160] [2020-10-15 16:27:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:29,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867622160] [2020-10-15 16:27:29,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108185568] [2020-10-15 16:27:29,281 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:29,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:29,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:27:29,688 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 16:27:29,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:29,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821881613] [2020-10-15 16:27:29,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:29,690 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:31,886 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 16:27:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:31,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:31,889 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:27:31,889 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:27:31,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:27:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:27:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 16:27:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:27:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:27:31,902 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:27:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:31,902 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:27:31,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:27:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:31,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:31,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:32,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:32,114 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:32,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-10-15 16:27:32,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:32,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14792923] [2020-10-15 16:27:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:32,314 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 16:27:32,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14792923] [2020-10-15 16:27:32,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188151573] [2020-10-15 16:27:32,315 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:32,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:32,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:32,847 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 16:27:32,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:32,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:32,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524861552] [2020-10-15 16:27:32,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:32,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:32,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:32,849 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:27:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:35,225 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 16:27:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:35,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:35,230 INFO L225 Difference]: With dead ends: 274 [2020-10-15 16:27:35,230 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 16:27:35,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:27:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 16:27:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 16:27:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:27:35,234 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:27:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:35,235 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:27:35,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:27:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:35,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:35,236 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:35,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:35,442 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-10-15 16:27:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:35,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499624039] [2020-10-15 16:27:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:35,717 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 16:27:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499624039] [2020-10-15 16:27:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551642915] [2020-10-15 16:27:35,718 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:35,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:27:35,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:35,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:36,403 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 16:27:36,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:36,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:36,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066846116] [2020-10-15 16:27:36,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:36,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:36,406 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:27:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:39,236 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 16:27:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:39,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:39,242 INFO L225 Difference]: With dead ends: 282 [2020-10-15 16:27:39,243 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:27:39,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:27:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:27:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 16:27:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 16:27:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 16:27:39,249 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 16:27:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:39,249 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 16:27:39,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 16:27:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:39,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:39,250 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:39,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:27:39,455 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-10-15 16:27:39,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:39,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498106468] [2020-10-15 16:27:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498106468] [2020-10-15 16:27:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999566312] [2020-10-15 16:27:39,755 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:40,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:40,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:40,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766196521] [2020-10-15 16:27:40,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:40,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:40,409 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 16:27:41,788 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-10-15 16:27:42,537 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-10-15 16:27:43,151 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-10-15 16:27:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:43,965 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 16:27:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:27:43,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:43,972 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:27:43,972 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:27:43,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:27:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:27:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 16:27:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 16:27:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 16:27:43,977 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 16:27:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:43,977 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 16:27:43,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 16:27:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:43,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:43,977 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:44,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:27:44,178 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-10-15 16:27:44,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:44,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503396122] [2020-10-15 16:27:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:44,482 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 16:27:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503396122] [2020-10-15 16:27:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156590423] [2020-10-15 16:27:44,483 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:44,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:49,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:49,289 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 16:27:49,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:49,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:49,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647005253] [2020-10-15 16:27:49,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:49,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:49,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 16:27:49,290 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 16:27:54,322 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 16:27:58,547 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:28:02,917 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 Received shutdown request... [2020-10-15 16:28:05,196 WARN L210 SmtUtils]: Removed 5 from assertion stack [2020-10-15 16:28:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:28:05,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 16:28:05,398 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:28:05,402 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:28:05,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:28:05 BasicIcfg [2020-10-15 16:28:05,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:28:05,403 INFO L168 Benchmark]: Toolchain (without parser) took 875444.10 ms. Allocated memory was 251.7 MB in the beginning and 225.4 MB in the end (delta: -26.2 MB). Free memory was 204.3 MB in the beginning and 188.1 MB in the end (delta: 16.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:28:05,403 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory was 227.2 MB in the beginning and 226.4 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 691.89 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 204.3 MB in the beginning and 269.8 MB in the end (delta: -65.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.70 ms. Allocated memory is still 315.1 MB. Free memory was 269.8 MB in the beginning and 267.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,404 INFO L168 Benchmark]: Boogie Preprocessor took 25.67 ms. Allocated memory is still 315.1 MB. Free memory was 267.2 MB in the beginning and 266.4 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,404 INFO L168 Benchmark]: RCFGBuilder took 416.13 ms. Allocated memory is still 315.1 MB. Free memory was 266.4 MB in the beginning and 245.3 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,405 INFO L168 Benchmark]: TraceAbstraction took 874259.68 ms. Allocated memory was 315.1 MB in the beginning and 225.4 MB in the end (delta: -89.7 MB). Free memory was 244.5 MB in the beginning and 188.1 MB in the end (delta: 56.4 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:28:05,407 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 251.7 MB. Free memory was 227.2 MB in the beginning and 226.4 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 691.89 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 204.3 MB in the beginning and 269.8 MB in the end (delta: -65.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.70 ms. Allocated memory is still 315.1 MB. Free memory was 269.8 MB in the beginning and 267.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.67 ms. Allocated memory is still 315.1 MB. Free memory was 267.2 MB in the beginning and 266.4 MB in the end (delta: 838.8 kB). Peak memory consumption was 838.8 kB. Max. memory is 14.2 GB. * RCFGBuilder took 416.13 ms. Allocated memory is still 315.1 MB. Free memory was 266.4 MB in the beginning and 245.3 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 874259.68 ms. Allocated memory was 315.1 MB in the beginning and 225.4 MB in the end (delta: -89.7 MB). Free memory was 244.5 MB in the beginning and 188.1 MB in the end (delta: 56.4 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 721 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (176states) and FLOYD_HOARE automaton (currently 16 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 51 for 2053ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 874.1s, OverallIterations: 258, TraceHistogramMax: 6, AutomataDifference: 664.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 3352 SDtfs, 30595 SDslu, 25670 SDs, 0 SdLazy, 18194 SolverSat, 7655 SolverUnsat, 111 SolverUnknown, 0 SolverNotchecked, 239.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7345 GetRequests, 1247 SyntacticMatches, 237 SemanticMatches, 5860 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38333 ImplicationChecksByTransitivity, 538.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 257 MinimizatonAttempts, 15145 StatesRemovedByMinimization, 257 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 142.1s InterpolantComputationTime, 6574 NumberOfCodeBlocks, 6574 NumberOfCodeBlocksAsserted, 805 NumberOfCheckSat, 6066 ConstructedInterpolants, 32 QuantifiedInterpolants, 673315 SizeOfPredicates, 250 NumberOfNonLiveVariables, 22230 ConjunctsInSsa, 2536 ConjunctsInUnsatCore, 508 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2794 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown