/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:45:45,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:45:45,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:45:45,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:45:45,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:45:45,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:45:45,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:45:45,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:45:45,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:45:45,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:45:45,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:45:45,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:45:45,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:45:45,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:45:45,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:45:45,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:45:45,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:45:45,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:45:45,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:45:45,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:45:45,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:45:45,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:45:45,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:45:45,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:45:45,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:45:45,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:45:45,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:45:45,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:45:45,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:45:45,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:45:45,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:45:45,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:45:45,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:45:45,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:45:45,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:45:45,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:45:45,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:45:45,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:45:45,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:45:45,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:45:45,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:45:45,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:45:45,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:45:45,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:45:45,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:45:45,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:45:45,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:45:45,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:45:45,815 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:45:45,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:45:45,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:45:45,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:45:45,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:45:45,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:45:45,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:45:45,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:45:45,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:45:45,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:45:45,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:45:46,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:45:46,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:45:46,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:45:46,147 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:45:46,151 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:45:46,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl [2021-07-09 18:45:46,152 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl' [2021-07-09 18:45:46,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:45:46,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:45:46,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:45:46,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:45:46,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:45:46,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:45:46,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:45:46,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:45:46,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:45:46,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/1) ... [2021-07-09 18:45:46,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:45:46,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:45:46,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:45:46,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:45:46,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (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 [2021-07-09 18:45:46,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:45:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:45:46,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:45:46,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:45:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:45:46,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:45:46,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:45:46,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:45:46,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:45:46,318 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:45:46,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:45:46,491 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:45:46,493 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:45:46 BoogieIcfgContainer [2021-07-09 18:45:46,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:45:46,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:45:46,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:45:46,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:45:46,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:45:46" (1/2) ... [2021-07-09 18:45:46,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de0b24c and model type easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:45:46, skipping insertion in model container [2021-07-09 18:45:46,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:45:46" (2/2) ... [2021-07-09 18:45:46,500 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.bpl [2021-07-09 18:45:46,508 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:45:46,508 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:45:46,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:45:46,510 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:45:46,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,553 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,554 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,555 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,555 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,555 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,556 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,557 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,559 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,566 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 18:45:46,577 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:45:46,606 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:45:46,631 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:45:46,631 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:45:46,632 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:45:46,632 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:45:46,632 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:45:46,632 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:45:46,632 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:45:46,632 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:45:46,643 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-09 18:45:46,662 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:46,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:46,672 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:46,673 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1728152339, now seen corresponding path program 1 times [2021-07-09 18:45:46,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:46,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724152152] [2021-07-09 18:45:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:47,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724152152] [2021-07-09 18:45:47,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724152152] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:47,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:47,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:47,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580421197] [2021-07-09 18:45:47,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:47,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:47,057 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:47,242 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-07-09 18:45:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:47,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:47,252 INFO L225 Difference]: With dead ends: 98 [2021-07-09 18:45:47,252 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:45:47,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:45:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-07-09 18:45:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-07-09 18:45:47,287 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 15 [2021-07-09 18:45:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:47,288 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-07-09 18:45:47,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-07-09 18:45:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:47,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:47,290 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:47,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:45:47,290 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2019667169, now seen corresponding path program 2 times [2021-07-09 18:45:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:47,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166576942] [2021-07-09 18:45:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:47,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166576942] [2021-07-09 18:45:47,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166576942] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:47,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:47,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:47,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130256990] [2021-07-09 18:45:47,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:47,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:47,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:47,418 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:47,626 INFO L93 Difference]: Finished difference Result 98 states and 190 transitions. [2021-07-09 18:45:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:47,630 INFO L225 Difference]: With dead ends: 98 [2021-07-09 18:45:47,631 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:45:47,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:45:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-07-09 18:45:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 127 transitions. [2021-07-09 18:45:47,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 127 transitions. Word has length 15 [2021-07-09 18:45:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:47,654 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 127 transitions. [2021-07-09 18:45:47,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 127 transitions. [2021-07-09 18:45:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:47,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:47,656 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:47,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:45:47,657 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash 949033841, now seen corresponding path program 3 times [2021-07-09 18:45:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003618423] [2021-07-09 18:45:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003618423] [2021-07-09 18:45:47,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003618423] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:47,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:47,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:47,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517665615] [2021-07-09 18:45:47,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:47,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:47,807 INFO L87 Difference]: Start difference. First operand 66 states and 127 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:47,982 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-07-09 18:45:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:47,985 INFO L225 Difference]: With dead ends: 89 [2021-07-09 18:45:47,985 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 18:45:47,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 18:45:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-07-09 18:45:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 128 transitions. [2021-07-09 18:45:48,000 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 128 transitions. Word has length 15 [2021-07-09 18:45:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,000 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 128 transitions. [2021-07-09 18:45:48,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 128 transitions. [2021-07-09 18:45:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:48,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,001 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:48,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:45:48,002 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1619078043, now seen corresponding path program 4 times [2021-07-09 18:45:48,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:48,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818592621] [2021-07-09 18:45:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:48,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818592621] [2021-07-09 18:45:48,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818592621] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:48,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:48,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:48,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790509264] [2021-07-09 18:45:48,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:48,123 INFO L87 Difference]: Start difference. First operand 67 states and 128 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:48,272 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-07-09 18:45:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:48,273 INFO L225 Difference]: With dead ends: 88 [2021-07-09 18:45:48,273 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 18:45:48,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 18:45:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-07-09 18:45:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-07-09 18:45:48,277 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 15 [2021-07-09 18:45:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,278 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-07-09 18:45:48,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-07-09 18:45:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:48,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,279 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:48,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:45:48,279 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash 168516007, now seen corresponding path program 5 times [2021-07-09 18:45:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:48,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460233610] [2021-07-09 18:45:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:48,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460233610] [2021-07-09 18:45:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460233610] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:48,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:48,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:48,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239916784] [2021-07-09 18:45:48,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:48,361 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:48,539 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-07-09 18:45:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:48,541 INFO L225 Difference]: With dead ends: 106 [2021-07-09 18:45:48,541 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 18:45:48,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 18:45:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-07-09 18:45:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-07-09 18:45:48,545 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-07-09 18:45:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,546 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-07-09 18:45:48,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-07-09 18:45:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:48,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,547 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:48,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:45:48,547 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1157750279, now seen corresponding path program 6 times [2021-07-09 18:45:48,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:48,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466046203] [2021-07-09 18:45:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466046203] [2021-07-09 18:45:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466046203] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:48,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038446882] [2021-07-09 18:45:48,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:48,662 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:48,884 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-07-09 18:45:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:48,885 INFO L225 Difference]: With dead ends: 98 [2021-07-09 18:45:48,885 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:45:48,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:45:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-07-09 18:45:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-07-09 18:45:48,889 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-07-09 18:45:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,889 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-07-09 18:45:48,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-07-09 18:45:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:48,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,890 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:48,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:45:48,891 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:48,891 INFO L82 PathProgramCache]: Analyzing trace with hash -487706077, now seen corresponding path program 7 times [2021-07-09 18:45:48,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:48,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555180714] [2021-07-09 18:45:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555180714] [2021-07-09 18:45:48,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555180714] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:48,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:48,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:48,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750840124] [2021-07-09 18:45:48,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:48,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:48,998 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:49,152 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-07-09 18:45:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:49,153 INFO L225 Difference]: With dead ends: 97 [2021-07-09 18:45:49,153 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:45:49,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:45:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-07-09 18:45:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-07-09 18:45:49,157 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-07-09 18:45:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:49,157 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-07-09 18:45:49,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-07-09 18:45:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:49,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:49,158 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:49,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:45:49,159 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -82039123, now seen corresponding path program 8 times [2021-07-09 18:45:49,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:49,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125193627] [2021-07-09 18:45:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:49,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125193627] [2021-07-09 18:45:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125193627] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:49,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:49,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:49,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827992260] [2021-07-09 18:45:49,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:49,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:49,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:49,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:49,267 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:49,454 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-07-09 18:45:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:49,455 INFO L225 Difference]: With dead ends: 95 [2021-07-09 18:45:49,456 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 18:45:49,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 18:45:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-07-09 18:45:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-07-09 18:45:49,468 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-07-09 18:45:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:49,468 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-07-09 18:45:49,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-07-09 18:45:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:49,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:49,469 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:49,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:45:49,470 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash 588005079, now seen corresponding path program 9 times [2021-07-09 18:45:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:49,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731007588] [2021-07-09 18:45:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:49,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731007588] [2021-07-09 18:45:49,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731007588] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:49,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:49,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:49,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845031730] [2021-07-09 18:45:49,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:49,586 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:49,767 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-07-09 18:45:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:49,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:49,774 INFO L225 Difference]: With dead ends: 94 [2021-07-09 18:45:49,774 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 18:45:49,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 18:45:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-07-09 18:45:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-07-09 18:45:49,779 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 15 [2021-07-09 18:45:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:49,780 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-07-09 18:45:49,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-07-09 18:45:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:49,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:49,781 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:49,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 18:45:49,781 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2044309529, now seen corresponding path program 10 times [2021-07-09 18:45:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577027879] [2021-07-09 18:45:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:49,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:49,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577027879] [2021-07-09 18:45:49,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577027879] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:49,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:49,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:49,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974028441] [2021-07-09 18:45:49,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:49,882 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:50,038 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-07-09 18:45:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:50,040 INFO L225 Difference]: With dead ends: 97 [2021-07-09 18:45:50,040 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:45:50,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:45:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-07-09 18:45:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2021-07-09 18:45:50,042 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 15 [2021-07-09 18:45:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:50,043 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2021-07-09 18:45:50,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2021-07-09 18:45:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:50,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:50,043 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:50,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 18:45:50,044 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:50,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1160181413, now seen corresponding path program 11 times [2021-07-09 18:45:50,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:50,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499576283] [2021-07-09 18:45:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:50,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499576283] [2021-07-09 18:45:50,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499576283] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:50,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:50,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:50,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687476945] [2021-07-09 18:45:50,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:50,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:50,122 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:50,274 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2021-07-09 18:45:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:50,275 INFO L225 Difference]: With dead ends: 110 [2021-07-09 18:45:50,275 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 18:45:50,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 18:45:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-07-09 18:45:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-09 18:45:50,278 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 15 [2021-07-09 18:45:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:50,278 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-09 18:45:50,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-09 18:45:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:50,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:50,279 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:50,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 18:45:50,279 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1808519597, now seen corresponding path program 12 times [2021-07-09 18:45:50,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:50,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056454905] [2021-07-09 18:45:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:50,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056454905] [2021-07-09 18:45:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056454905] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:50,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353116343] [2021-07-09 18:45:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:50,359 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:50,526 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-07-09 18:45:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:50,527 INFO L225 Difference]: With dead ends: 102 [2021-07-09 18:45:50,527 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 18:45:50,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 18:45:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-07-09 18:45:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-07-09 18:45:50,530 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-07-09 18:45:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:50,531 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-07-09 18:45:50,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-07-09 18:45:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:50,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:50,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:50,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 18:45:50,532 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1816403497, now seen corresponding path program 13 times [2021-07-09 18:45:50,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:50,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130460415] [2021-07-09 18:45:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:50,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130460415] [2021-07-09 18:45:50,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130460415] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:50,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:50,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216424131] [2021-07-09 18:45:50,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:50,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:50,600 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:50,785 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-07-09 18:45:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:50,786 INFO L225 Difference]: With dead ends: 101 [2021-07-09 18:45:50,786 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 18:45:50,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 18:45:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-07-09 18:45:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-09 18:45:50,790 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 15 [2021-07-09 18:45:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:50,790 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-09 18:45:50,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-09 18:45:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:50,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:50,790 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:50,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 18:45:50,791 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1410736543, now seen corresponding path program 14 times [2021-07-09 18:45:50,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:50,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475681025] [2021-07-09 18:45:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:50,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475681025] [2021-07-09 18:45:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475681025] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095934721] [2021-07-09 18:45:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:50,863 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,006 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-07-09 18:45:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,007 INFO L225 Difference]: With dead ends: 104 [2021-07-09 18:45:51,007 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 18:45:51,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 18:45:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-07-09 18:45:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-07-09 18:45:51,010 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-07-09 18:45:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,011 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-07-09 18:45:51,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-07-09 18:45:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:51,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,011 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 18:45:51,012 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -740692341, now seen corresponding path program 15 times [2021-07-09 18:45:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262412771] [2021-07-09 18:45:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262412771] [2021-07-09 18:45:51,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262412771] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:51,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:51,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:51,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845796946] [2021-07-09 18:45:51,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:51,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:51,082 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,235 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-07-09 18:45:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,236 INFO L225 Difference]: With dead ends: 103 [2021-07-09 18:45:51,236 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 18:45:51,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 18:45:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-07-09 18:45:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-07-09 18:45:51,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 15 [2021-07-09 18:45:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,240 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-07-09 18:45:51,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-07-09 18:45:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:51,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,240 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 18:45:51,240 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 921960347, now seen corresponding path program 16 times [2021-07-09 18:45:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229493226] [2021-07-09 18:45:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229493226] [2021-07-09 18:45:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229493226] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:51,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:51,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689590849] [2021-07-09 18:45:51,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:51,314 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,457 INFO L93 Difference]: Finished difference Result 106 states and 212 transitions. [2021-07-09 18:45:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,458 INFO L225 Difference]: With dead ends: 106 [2021-07-09 18:45:51,458 INFO L226 Difference]: Without dead ends: 97 [2021-07-09 18:45:51,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-09 18:45:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2021-07-09 18:45:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-07-09 18:45:51,461 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 15 [2021-07-09 18:45:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,461 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-07-09 18:45:51,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-07-09 18:45:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:51,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,462 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 18:45:51,462 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1329337487, now seen corresponding path program 17 times [2021-07-09 18:45:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496290490] [2021-07-09 18:45:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496290490] [2021-07-09 18:45:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496290490] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432183208] [2021-07-09 18:45:51,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:51,568 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,699 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-07-09 18:45:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,700 INFO L225 Difference]: With dead ends: 95 [2021-07-09 18:45:51,700 INFO L226 Difference]: Without dead ends: 85 [2021-07-09 18:45:51,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-09 18:45:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-07-09 18:45:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-07-09 18:45:51,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 15 [2021-07-09 18:45:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,703 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-07-09 18:45:51,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-07-09 18:45:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:51,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,703 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:45:51,704 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash -659293285, now seen corresponding path program 18 times [2021-07-09 18:45:51,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795005180] [2021-07-09 18:45:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795005180] [2021-07-09 18:45:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795005180] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:51,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:51,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:51,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836866399] [2021-07-09 18:45:51,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:51,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:51,775 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,912 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2021-07-09 18:45:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,913 INFO L225 Difference]: With dead ends: 94 [2021-07-09 18:45:51,913 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 18:45:51,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 18:45:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-07-09 18:45:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-07-09 18:45:51,916 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 15 [2021-07-09 18:45:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,916 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-07-09 18:45:51,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-07-09 18:45:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:51,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,917 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-09 18:45:51,917 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359403, now seen corresponding path program 19 times [2021-07-09 18:45:51,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496328478] [2021-07-09 18:45:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496328478] [2021-07-09 18:45:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496328478] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354067022] [2021-07-09 18:45:51,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:51,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:51,986 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:52,143 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-07-09 18:45:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:52,144 INFO L225 Difference]: With dead ends: 97 [2021-07-09 18:45:52,144 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:45:52,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:45:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-07-09 18:45:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.971830985915493) internal successors, (140), 71 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2021-07-09 18:45:52,150 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 15 [2021-07-09 18:45:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:52,151 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2021-07-09 18:45:52,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2021-07-09 18:45:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:45:52,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:52,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:52,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-09 18:45:52,152 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -67100201, now seen corresponding path program 20 times [2021-07-09 18:45:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:52,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246265615] [2021-07-09 18:45:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:52,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:52,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246265615] [2021-07-09 18:45:52,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246265615] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:52,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:52,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-09 18:45:52,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727194529] [2021-07-09 18:45:52,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:45:52,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:45:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:52,250 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:52,406 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-07-09 18:45:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:45:52,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:45:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:52,407 INFO L225 Difference]: With dead ends: 103 [2021-07-09 18:45:52,407 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 18:45:52,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 18:45:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-07-09 18:45:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 143 transitions. [2021-07-09 18:45:52,414 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 143 transitions. Word has length 15 [2021-07-09 18:45:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:52,414 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 143 transitions. [2021-07-09 18:45:52,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 143 transitions. [2021-07-09 18:45:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:52,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:52,415 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:52,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-07-09 18:45:52,416 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash -55242805, now seen corresponding path program 1 times [2021-07-09 18:45:52,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:52,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941891763] [2021-07-09 18:45:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:52,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941891763] [2021-07-09 18:45:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941891763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:52,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811905481] [2021-07-09 18:45:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:45:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:45:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:52,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811905481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:52,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:52,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:45:52,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031858183] [2021-07-09 18:45:52,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:52,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:52,600 INFO L87 Difference]: Start difference. First operand 74 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:52,689 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-07-09 18:45:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:52,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:52,690 INFO L225 Difference]: With dead ends: 108 [2021-07-09 18:45:52,690 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 18:45:52,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 18:45:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-07-09 18:45:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-07-09 18:45:52,693 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 17 [2021-07-09 18:45:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:52,693 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-07-09 18:45:52,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-07-09 18:45:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:52,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:52,693 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:52,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:45:52,929 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1323979185, now seen corresponding path program 1 times [2021-07-09 18:45:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252145082] [2021-07-09 18:45:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:52,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:52,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252145082] [2021-07-09 18:45:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252145082] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:52,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:52,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437970245] [2021-07-09 18:45:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:52,953 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,029 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-07-09 18:45:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,042 INFO L225 Difference]: With dead ends: 120 [2021-07-09 18:45:53,042 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 18:45:53,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 18:45:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-07-09 18:45:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-07-09 18:45:53,044 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 17 [2021-07-09 18:45:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,044 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-07-09 18:45:53,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-07-09 18:45:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,045 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:53,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-07-09 18:45:53,045 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131849, now seen corresponding path program 2 times [2021-07-09 18:45:53,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248116150] [2021-07-09 18:45:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248116150] [2021-07-09 18:45:53,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248116150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609587777] [2021-07-09 18:45:53,079 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 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 [2021-07-09 18:45:53,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:45:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609587777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:53,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:45:53,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613964120] [2021-07-09 18:45:53,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:53,210 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,283 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-07-09 18:45:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,284 INFO L225 Difference]: With dead ends: 116 [2021-07-09 18:45:53,284 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 18:45:53,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 18:45:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2021-07-09 18:45:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-07-09 18:45:53,287 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 17 [2021-07-09 18:45:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,287 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-07-09 18:45:53,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-07-09 18:45:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,288 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:45:53,512 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 308167817, now seen corresponding path program 2 times [2021-07-09 18:45:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406925580] [2021-07-09 18:45:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406925580] [2021-07-09 18:45:53,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406925580] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:53,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:53,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915711697] [2021-07-09 18:45:53,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:53,533 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,614 INFO L93 Difference]: Finished difference Result 153 states and 286 transitions. [2021-07-09 18:45:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:45:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,615 INFO L225 Difference]: With dead ends: 153 [2021-07-09 18:45:53,615 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 18:45:53,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 18:45:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 80. [2021-07-09 18:45:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-07-09 18:45:53,618 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 17 [2021-07-09 18:45:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,618 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-07-09 18:45:53,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-07-09 18:45:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,619 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:53,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-07-09 18:45:53,619 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1656584079, now seen corresponding path program 3 times [2021-07-09 18:45:53,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441784740] [2021-07-09 18:45:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441784740] [2021-07-09 18:45:53,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441784740] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:53,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:53,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257162568] [2021-07-09 18:45:53,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:53,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:53,638 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,712 INFO L93 Difference]: Finished difference Result 126 states and 243 transitions. [2021-07-09 18:45:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:45:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,713 INFO L225 Difference]: With dead ends: 126 [2021-07-09 18:45:53,713 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 18:45:53,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 18:45:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-07-09 18:45:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-09 18:45:53,716 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-07-09 18:45:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,716 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-09 18:45:53,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-09 18:45:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,717 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:53,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-07-09 18:45:53,717 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2146658699, now seen corresponding path program 3 times [2021-07-09 18:45:53,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136676170] [2021-07-09 18:45:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136676170] [2021-07-09 18:45:53,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136676170] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:53,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:53,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621442418] [2021-07-09 18:45:53,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:53,743 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,801 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-07-09 18:45:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:45:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,803 INFO L225 Difference]: With dead ends: 86 [2021-07-09 18:45:53,803 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 18:45:53,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 18:45:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-07-09 18:45:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-07-09 18:45:53,812 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-07-09 18:45:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,812 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-07-09 18:45:53,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-07-09 18:45:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,813 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:53,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-07-09 18:45:53,814 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -60801859, now seen corresponding path program 4 times [2021-07-09 18:45:53,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426145187] [2021-07-09 18:45:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426145187] [2021-07-09 18:45:53,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426145187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227590613] [2021-07-09 18:45:53,837 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 [2021-07-09 18:45:53,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:45:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227590613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:53,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:45:53,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971743722] [2021-07-09 18:45:53,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:53,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:53,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:53,917 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:53,987 INFO L93 Difference]: Finished difference Result 124 states and 233 transitions. [2021-07-09 18:45:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:45:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,988 INFO L225 Difference]: With dead ends: 124 [2021-07-09 18:45:53,988 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 18:45:53,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 18:45:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-07-09 18:45:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-07-09 18:45:53,991 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-07-09 18:45:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,991 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-07-09 18:45:53,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-07-09 18:45:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:53,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,992 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:45:54,205 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -964765891, now seen corresponding path program 4 times [2021-07-09 18:45:54,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814414507] [2021-07-09 18:45:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814414507] [2021-07-09 18:45:54,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814414507] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:54,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:54,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922504593] [2021-07-09 18:45:54,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:54,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:54,230 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,289 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-07-09 18:45:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:45:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,289 INFO L225 Difference]: With dead ends: 113 [2021-07-09 18:45:54,289 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 18:45:54,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 18:45:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-07-09 18:45:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-07-09 18:45:54,291 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-07-09 18:45:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,291 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-07-09 18:45:54,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-07-09 18:45:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:54,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,292 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-07-09 18:45:54,292 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 383650371, now seen corresponding path program 5 times [2021-07-09 18:45:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227937339] [2021-07-09 18:45:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227937339] [2021-07-09 18:45:54,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227937339] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:54,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:54,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:54,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033084115] [2021-07-09 18:45:54,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:54,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:54,315 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,388 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2021-07-09 18:45:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,389 INFO L225 Difference]: With dead ends: 114 [2021-07-09 18:45:54,390 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 18:45:54,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 18:45:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-07-09 18:45:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-07-09 18:45:54,393 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-07-09 18:45:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,393 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-07-09 18:45:54,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-07-09 18:45:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:54,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,394 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-07-09 18:45:54,394 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 873724991, now seen corresponding path program 5 times [2021-07-09 18:45:54,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723871355] [2021-07-09 18:45:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723871355] [2021-07-09 18:45:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723871355] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:54,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:54,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:54,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876509339] [2021-07-09 18:45:54,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:54,429 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,501 INFO L93 Difference]: Finished difference Result 139 states and 260 transitions. [2021-07-09 18:45:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:45:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,502 INFO L225 Difference]: With dead ends: 139 [2021-07-09 18:45:54,503 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 18:45:54,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:45:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 18:45:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-07-09 18:45:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.975) internal successors, (158), 80 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 158 transitions. [2021-07-09 18:45:54,505 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 158 transitions. Word has length 17 [2021-07-09 18:45:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,506 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 158 transitions. [2021-07-09 18:45:54,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 158 transitions. [2021-07-09 18:45:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:54,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,506 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-07-09 18:45:54,506 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1721217585, now seen corresponding path program 6 times [2021-07-09 18:45:54,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432698939] [2021-07-09 18:45:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432698939] [2021-07-09 18:45:54,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432698939] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:54,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:54,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548278511] [2021-07-09 18:45:54,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:54,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:54,530 INFO L87 Difference]: Start difference. First operand 81 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,594 INFO L93 Difference]: Finished difference Result 105 states and 195 transitions. [2021-07-09 18:45:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,595 INFO L225 Difference]: With dead ends: 105 [2021-07-09 18:45:54,595 INFO L226 Difference]: Without dead ends: 105 [2021-07-09 18:45:54,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-09 18:45:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-07-09 18:45:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-07-09 18:45:54,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 17 [2021-07-09 18:45:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,597 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-07-09 18:45:54,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-07-09 18:45:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:45:54,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,598 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-07-09 18:45:54,598 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1788806479, now seen corresponding path program 6 times [2021-07-09 18:45:54,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119034159] [2021-07-09 18:45:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119034159] [2021-07-09 18:45:54,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119034159] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:54,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:45:54,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:45:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589132243] [2021-07-09 18:45:54,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:45:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:45:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:45:54,619 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,671 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-07-09 18:45:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:45:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:45:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,672 INFO L225 Difference]: With dead ends: 82 [2021-07-09 18:45:54,672 INFO L226 Difference]: Without dead ends: 76 [2021-07-09 18:45:54,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:45:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-09 18:45:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-07-09 18:45:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2021-07-09 18:45:54,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2021-07-09 18:45:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,677 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2021-07-09 18:45:54,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2021-07-09 18:45:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:54,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,677 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:54,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-07-09 18:45:54,677 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash 24314285, now seen corresponding path program 1 times [2021-07-09 18:45:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539083256] [2021-07-09 18:45:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539083256] [2021-07-09 18:45:54,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539083256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:54,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113087321] [2021-07-09 18:45:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:45:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113087321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:55,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:55,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:45:55,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675184337] [2021-07-09 18:45:55,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:55,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:55,044 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:55,262 INFO L93 Difference]: Finished difference Result 87 states and 162 transitions. [2021-07-09 18:45:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:45:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:55,263 INFO L225 Difference]: With dead ends: 87 [2021-07-09 18:45:55,263 INFO L226 Difference]: Without dead ends: 60 [2021-07-09 18:45:55,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:45:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-09 18:45:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-07-09 18:45:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-07-09 18:45:55,266 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 19 [2021-07-09 18:45:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:55,266 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-07-09 18:45:55,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-07-09 18:45:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:55,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:55,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:55,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:55,481 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash -640382641, now seen corresponding path program 2 times [2021-07-09 18:45:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:55,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89555707] [2021-07-09 18:45:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:55,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89555707] [2021-07-09 18:45:55,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89555707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:55,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266821820] [2021-07-09 18:45:55,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:55,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:45:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:55,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266821820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:55,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:55,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:45:55,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341790818] [2021-07-09 18:45:55,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:55,856 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:56,063 INFO L93 Difference]: Finished difference Result 78 states and 138 transitions. [2021-07-09 18:45:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:45:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:56,064 INFO L225 Difference]: With dead ends: 78 [2021-07-09 18:45:56,064 INFO L226 Difference]: Without dead ends: 62 [2021-07-09 18:45:56,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:45:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-09 18:45:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-07-09 18:45:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2021-07-09 18:45:56,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 19 [2021-07-09 18:45:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:56,066 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2021-07-09 18:45:56,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2021-07-09 18:45:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:56,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:56,066 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:56,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:45:56,277 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 111018267, now seen corresponding path program 3 times [2021-07-09 18:45:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:56,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175426070] [2021-07-09 18:45:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:56,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175426070] [2021-07-09 18:45:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175426070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926960149] [2021-07-09 18:45:56,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:56,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:45:56,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:45:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926960149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:45:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401553754] [2021-07-09 18:45:56,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:56,683 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:56,904 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-07-09 18:45:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:45:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:56,905 INFO L225 Difference]: With dead ends: 80 [2021-07-09 18:45:56,905 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 18:45:56,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:45:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 18:45:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-07-09 18:45:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-07-09 18:45:56,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 19 [2021-07-09 18:45:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:56,907 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-07-09 18:45:56,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-07-09 18:45:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:56,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:56,908 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:57,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:57,121 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1215248019, now seen corresponding path program 4 times [2021-07-09 18:45:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:57,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738998704] [2021-07-09 18:45:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:57,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738998704] [2021-07-09 18:45:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738998704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:57,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612595254] [2021-07-09 18:45:57,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:57,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:45:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612595254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:57,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:57,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47116016] [2021-07-09 18:45:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:57,471 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:57,901 INFO L93 Difference]: Finished difference Result 109 states and 201 transitions. [2021-07-09 18:45:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:45:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:57,902 INFO L225 Difference]: With dead ends: 109 [2021-07-09 18:45:57,902 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 18:45:57,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:45:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 18:45:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-07-09 18:45:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 161 transitions. [2021-07-09 18:45:57,905 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 161 transitions. Word has length 19 [2021-07-09 18:45:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:57,905 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 161 transitions. [2021-07-09 18:45:57,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 161 transitions. [2021-07-09 18:45:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:57,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:57,906 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:58,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:45:58,117 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash -545203817, now seen corresponding path program 5 times [2021-07-09 18:45:58,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:58,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294150693] [2021-07-09 18:45:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:58,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294150693] [2021-07-09 18:45:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294150693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988791072] [2021-07-09 18:45:58,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:58,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:58,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:45:58,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:58,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988791072] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:45:58,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:45:58,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:45:58,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733643507] [2021-07-09 18:45:58,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:45:58,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:45:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:58,461 INFO L87 Difference]: Start difference. First operand 86 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:58,516 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2021-07-09 18:45:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:45:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:58,517 INFO L225 Difference]: With dead ends: 96 [2021-07-09 18:45:58,517 INFO L226 Difference]: Without dead ends: 78 [2021-07-09 18:45:58,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-09 18:45:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-07-09 18:45:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 76 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 146 transitions. [2021-07-09 18:45:58,519 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 146 transitions. Word has length 19 [2021-07-09 18:45:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:58,520 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 146 transitions. [2021-07-09 18:45:58,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 146 transitions. [2021-07-09 18:45:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:58,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:58,520 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:58,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:45:58,721 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1290089747, now seen corresponding path program 6 times [2021-07-09 18:45:58,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:58,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186375464] [2021-07-09 18:45:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:58,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186375464] [2021-07-09 18:45:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186375464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435221664] [2021-07-09 18:45:58,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:45:58,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:45:58,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:45:58,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435221664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:59,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:59,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132749052] [2021-07-09 18:45:59,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:59,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:59,044 INFO L87 Difference]: Start difference. First operand 77 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:59,347 INFO L93 Difference]: Finished difference Result 108 states and 202 transitions. [2021-07-09 18:45:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:45:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:45:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:59,348 INFO L225 Difference]: With dead ends: 108 [2021-07-09 18:45:59,348 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 18:45:59,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:45:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 18:45:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-07-09 18:45:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 82 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 158 transitions. [2021-07-09 18:45:59,351 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 158 transitions. Word has length 19 [2021-07-09 18:45:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:59,351 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 158 transitions. [2021-07-09 18:45:59,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2021-07-09 18:45:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:45:59,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:59,351 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:59,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:45:59,561 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash -538688839, now seen corresponding path program 7 times [2021-07-09 18:45:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:59,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306953200] [2021-07-09 18:45:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306953200] [2021-07-09 18:45:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306953200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038784389] [2021-07-09 18:45:59,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:45:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:45:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038784389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:59,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:45:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159228984] [2021-07-09 18:45:59,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:45:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:45:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:59,911 INFO L87 Difference]: Start difference. First operand 83 states and 158 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:00,209 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-07-09 18:46:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:00,210 INFO L225 Difference]: With dead ends: 113 [2021-07-09 18:46:00,210 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 18:46:00,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:46:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 18:46:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-07-09 18:46:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2021-07-09 18:46:00,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2021-07-09 18:46:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:00,212 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2021-07-09 18:46:00,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2021-07-09 18:46:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:00,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:00,213 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:00,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:46:00,421 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1864955125, now seen corresponding path program 8 times [2021-07-09 18:46:00,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:00,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630162545] [2021-07-09 18:46:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:00,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630162545] [2021-07-09 18:46:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630162545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509268336] [2021-07-09 18:46:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:00,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:00,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509268336] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:00,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:00,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374389981] [2021-07-09 18:46:00,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:00,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:00,737 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:00,817 INFO L93 Difference]: Finished difference Result 101 states and 183 transitions. [2021-07-09 18:46:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:00,818 INFO L225 Difference]: With dead ends: 101 [2021-07-09 18:46:00,818 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:46:00,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:46:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-07-09 18:46:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 159 transitions. [2021-07-09 18:46:00,820 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 159 transitions. Word has length 19 [2021-07-09 18:46:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:00,820 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 159 transitions. [2021-07-09 18:46:00,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 159 transitions. [2021-07-09 18:46:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:00,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:00,821 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:01,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:46:01,033 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1194910923, now seen corresponding path program 9 times [2021-07-09 18:46:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:01,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610129132] [2021-07-09 18:46:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:01,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610129132] [2021-07-09 18:46:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610129132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:01,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103212507] [2021-07-09 18:46:01,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:01,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:46:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103212507] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:01,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597679437] [2021-07-09 18:46:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:01,367 INFO L87 Difference]: Start difference. First operand 84 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:01,438 INFO L93 Difference]: Finished difference Result 93 states and 170 transitions. [2021-07-09 18:46:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:01,441 INFO L225 Difference]: With dead ends: 93 [2021-07-09 18:46:01,441 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 18:46:01,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 18:46:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-07-09 18:46:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.925) internal successors, (154), 80 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 154 transitions. [2021-07-09 18:46:01,444 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 154 transitions. Word has length 19 [2021-07-09 18:46:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:01,444 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 154 transitions. [2021-07-09 18:46:01,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 154 transitions. [2021-07-09 18:46:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:01,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:01,445 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:01,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:01,661 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1143148071, now seen corresponding path program 10 times [2021-07-09 18:46:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966049233] [2021-07-09 18:46:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:01,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966049233] [2021-07-09 18:46:01,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966049233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:01,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279204364] [2021-07-09 18:46:01,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:01,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279204364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:01,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:01,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:01,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133448219] [2021-07-09 18:46:01,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:01,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:01,936 INFO L87 Difference]: Start difference. First operand 81 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:02,834 INFO L93 Difference]: Finished difference Result 176 states and 352 transitions. [2021-07-09 18:46:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:46:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:02,835 INFO L225 Difference]: With dead ends: 176 [2021-07-09 18:46:02,835 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 18:46:02,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:46:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 18:46:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-07-09 18:46:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 218 transitions. [2021-07-09 18:46:02,840 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 218 transitions. Word has length 19 [2021-07-09 18:46:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:02,840 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 218 transitions. [2021-07-09 18:46:02,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 218 transitions. [2021-07-09 18:46:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:02,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:02,841 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:03,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:46:03,045 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash 486925987, now seen corresponding path program 11 times [2021-07-09 18:46:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:03,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133818633] [2021-07-09 18:46:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:03,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133818633] [2021-07-09 18:46:03,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133818633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133253648] [2021-07-09 18:46:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:03,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133253648] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:03,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:03,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:03,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900295049] [2021-07-09 18:46:03,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:03,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:03,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:03,345 INFO L87 Difference]: Start difference. First operand 108 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:03,491 INFO L93 Difference]: Finished difference Result 138 states and 273 transitions. [2021-07-09 18:46:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:03,493 INFO L225 Difference]: With dead ends: 138 [2021-07-09 18:46:03,493 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 18:46:03,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:46:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 18:46:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-07-09 18:46:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-09 18:46:03,498 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-09 18:46:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:03,500 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-09 18:46:03,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-09 18:46:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:03,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:03,500 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:03,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:03,725 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1562637143, now seen corresponding path program 12 times [2021-07-09 18:46:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:03,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454516839] [2021-07-09 18:46:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:03,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454516839] [2021-07-09 18:46:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454516839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171304598] [2021-07-09 18:46:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:03,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:04,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171304598] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:04,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:04,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:04,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577440360] [2021-07-09 18:46:04,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:04,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:04,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:04,024 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:04,142 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-07-09 18:46:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:04,143 INFO L225 Difference]: With dead ends: 128 [2021-07-09 18:46:04,143 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 18:46:04,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:46:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 18:46:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-07-09 18:46:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-09 18:46:04,146 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-07-09 18:46:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:04,146 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-09 18:46:04,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-09 18:46:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:04,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:04,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:04,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:46:04,361 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1069677465, now seen corresponding path program 13 times [2021-07-09 18:46:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976393241] [2021-07-09 18:46:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976393241] [2021-07-09 18:46:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976393241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861633789] [2021-07-09 18:46:04,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:04,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861633789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:04,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:04,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862502682] [2021-07-09 18:46:04,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:04,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:04,668 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:04,963 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-07-09 18:46:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:04,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:04,963 INFO L225 Difference]: With dead ends: 128 [2021-07-09 18:46:04,964 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 18:46:04,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 18:46:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-07-09 18:46:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-09 18:46:04,966 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-07-09 18:46:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:04,966 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-09 18:46:04,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-09 18:46:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:04,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:04,967 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:05,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:05,189 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1532453059, now seen corresponding path program 14 times [2021-07-09 18:46:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:05,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178362842] [2021-07-09 18:46:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:05,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178362842] [2021-07-09 18:46:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178362842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89446677] [2021-07-09 18:46:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:05,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:05,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89446677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:05,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696693420] [2021-07-09 18:46:05,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:05,505 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:06,006 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-07-09 18:46:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:46:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:06,008 INFO L225 Difference]: With dead ends: 202 [2021-07-09 18:46:06,008 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 18:46:06,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:46:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 18:46:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2021-07-09 18:46:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-07-09 18:46:06,011 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-07-09 18:46:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:06,012 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-07-09 18:46:06,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-07-09 18:46:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:06,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:06,012 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:06,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:46:06,228 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1450387207, now seen corresponding path program 15 times [2021-07-09 18:46:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:06,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805168434] [2021-07-09 18:46:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:06,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:06,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805168434] [2021-07-09 18:46:06,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805168434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:06,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012283056] [2021-07-09 18:46:06,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:06,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:06,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012283056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:06,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:06,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:06,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911133410] [2021-07-09 18:46:06,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:06,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:06,526 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:06,840 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-07-09 18:46:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:46:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:06,841 INFO L225 Difference]: With dead ends: 184 [2021-07-09 18:46:06,841 INFO L226 Difference]: Without dead ends: 171 [2021-07-09 18:46:06,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:46:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-09 18:46:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-07-09 18:46:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1842105263157894) internal successors, (332), 152 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 332 transitions. [2021-07-09 18:46:06,844 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 332 transitions. Word has length 19 [2021-07-09 18:46:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:06,844 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 332 transitions. [2021-07-09 18:46:06,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 332 transitions. [2021-07-09 18:46:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:06,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:06,845 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:07,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:46:07,054 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:07,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1731743665, now seen corresponding path program 16 times [2021-07-09 18:46:07,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:07,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220201796] [2021-07-09 18:46:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:07,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:07,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220201796] [2021-07-09 18:46:07,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220201796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:07,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715339435] [2021-07-09 18:46:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:07,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715339435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:07,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:07,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972074736] [2021-07-09 18:46:07,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:07,371 INFO L87 Difference]: Start difference. First operand 153 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:08,017 INFO L93 Difference]: Finished difference Result 335 states and 734 transitions. [2021-07-09 18:46:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:46:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:08,019 INFO L225 Difference]: With dead ends: 335 [2021-07-09 18:46:08,020 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 18:46:08,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:46:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 18:46:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2021-07-09 18:46:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2600896860986546) internal successors, (504), 223 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 504 transitions. [2021-07-09 18:46:08,026 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 504 transitions. Word has length 19 [2021-07-09 18:46:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:08,026 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 504 transitions. [2021-07-09 18:46:08,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 504 transitions. [2021-07-09 18:46:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:08,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:08,027 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:08,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:46:08,241 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1036341529, now seen corresponding path program 17 times [2021-07-09 18:46:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:08,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023892472] [2021-07-09 18:46:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:08,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:08,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023892472] [2021-07-09 18:46:08,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023892472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089814841] [2021-07-09 18:46:08,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:08,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:08,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089814841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:08,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:08,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106558014] [2021-07-09 18:46:08,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:08,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:08,515 INFO L87 Difference]: Start difference. First operand 224 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:08,993 INFO L93 Difference]: Finished difference Result 349 states and 784 transitions. [2021-07-09 18:46:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:46:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:08,994 INFO L225 Difference]: With dead ends: 349 [2021-07-09 18:46:08,994 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 18:46:08,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:46:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 18:46:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 250. [2021-07-09 18:46:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3453815261044175) internal successors, (584), 249 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 584 transitions. [2021-07-09 18:46:09,001 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 584 transitions. Word has length 19 [2021-07-09 18:46:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:09,001 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 584 transitions. [2021-07-09 18:46:09,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 584 transitions. [2021-07-09 18:46:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:09,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:09,002 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:09,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:46:09,227 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 881151661, now seen corresponding path program 18 times [2021-07-09 18:46:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251047677] [2021-07-09 18:46:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:09,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:09,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251047677] [2021-07-09 18:46:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251047677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:09,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091865095] [2021-07-09 18:46:09,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:09,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:09,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091865095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:09,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:09,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484573318] [2021-07-09 18:46:09,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:09,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:09,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:09,535 INFO L87 Difference]: Start difference. First operand 250 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:09,745 INFO L93 Difference]: Finished difference Result 293 states and 661 transitions. [2021-07-09 18:46:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:09,747 INFO L225 Difference]: With dead ends: 293 [2021-07-09 18:46:09,747 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 18:46:09,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:46:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 18:46:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 250. [2021-07-09 18:46:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3373493975903616) internal successors, (582), 249 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 582 transitions. [2021-07-09 18:46:09,753 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 582 transitions. Word has length 19 [2021-07-09 18:46:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:09,753 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 582 transitions. [2021-07-09 18:46:09,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 582 transitions. [2021-07-09 18:46:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:09,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:09,754 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:09,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:46:09,957 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 306286283, now seen corresponding path program 19 times [2021-07-09 18:46:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676124352] [2021-07-09 18:46:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676124352] [2021-07-09 18:46:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676124352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187936877] [2021-07-09 18:46:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187936877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:10,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:10,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779688049] [2021-07-09 18:46:10,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:10,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:10,276 INFO L87 Difference]: Start difference. First operand 250 states and 582 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:10,524 INFO L93 Difference]: Finished difference Result 290 states and 653 transitions. [2021-07-09 18:46:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:10,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:10,526 INFO L225 Difference]: With dead ends: 290 [2021-07-09 18:46:10,526 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 18:46:10,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 18:46:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 248. [2021-07-09 18:46:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3441295546558703) internal successors, (579), 247 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 579 transitions. [2021-07-09 18:46:10,531 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 579 transitions. Word has length 19 [2021-07-09 18:46:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:10,531 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 579 transitions. [2021-07-09 18:46:10,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 579 transitions. [2021-07-09 18:46:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:10,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:10,532 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:10,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:10,756 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 976330485, now seen corresponding path program 20 times [2021-07-09 18:46:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:10,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423045241] [2021-07-09 18:46:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423045241] [2021-07-09 18:46:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423045241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530373294] [2021-07-09 18:46:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:10,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:11,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530373294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:11,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:11,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:11,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417627241] [2021-07-09 18:46:11,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:11,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:11,066 INFO L87 Difference]: Start difference. First operand 248 states and 579 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:11,329 INFO L93 Difference]: Finished difference Result 277 states and 632 transitions. [2021-07-09 18:46:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:11,330 INFO L225 Difference]: With dead ends: 277 [2021-07-09 18:46:11,330 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 18:46:11,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 18:46:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-07-09 18:46:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.341463414634146) internal successors, (576), 246 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 576 transitions. [2021-07-09 18:46:11,335 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 576 transitions. Word has length 19 [2021-07-09 18:46:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:11,335 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 576 transitions. [2021-07-09 18:46:11,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 576 transitions. [2021-07-09 18:46:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:11,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:11,336 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:11,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:46:11,553 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1636799901, now seen corresponding path program 21 times [2021-07-09 18:46:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525831143] [2021-07-09 18:46:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:11,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525831143] [2021-07-09 18:46:11,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525831143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641339352] [2021-07-09 18:46:11,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:11,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:11,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:11,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641339352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:11,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:11,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:11,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935899911] [2021-07-09 18:46:11,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:11,864 INFO L87 Difference]: Start difference. First operand 247 states and 576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:12,266 INFO L93 Difference]: Finished difference Result 368 states and 842 transitions. [2021-07-09 18:46:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:46:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:12,268 INFO L225 Difference]: With dead ends: 368 [2021-07-09 18:46:12,268 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 18:46:12,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 399.3ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:46:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 18:46:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-07-09 18:46:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.350806451612903) internal successors, (583), 248 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 583 transitions. [2021-07-09 18:46:12,273 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 583 transitions. Word has length 19 [2021-07-09 18:46:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:12,273 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 583 transitions. [2021-07-09 18:46:12,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 583 transitions. [2021-07-09 18:46:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:12,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:12,274 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:12,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:12,497 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -561088745, now seen corresponding path program 22 times [2021-07-09 18:46:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:12,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549424118] [2021-07-09 18:46:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:12,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:12,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549424118] [2021-07-09 18:46:12,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549424118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080293155] [2021-07-09 18:46:12,588 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 [2021-07-09 18:46:12,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080293155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:12,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:12,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325833030] [2021-07-09 18:46:12,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:12,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:12,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:12,787 INFO L87 Difference]: Start difference. First operand 249 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:13,435 INFO L93 Difference]: Finished difference Result 314 states and 713 transitions. [2021-07-09 18:46:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:46:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:13,437 INFO L225 Difference]: With dead ends: 314 [2021-07-09 18:46:13,437 INFO L226 Difference]: Without dead ends: 303 [2021-07-09 18:46:13,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:46:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-09 18:46:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2021-07-09 18:46:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.342857142857143) internal successors, (574), 245 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 574 transitions. [2021-07-09 18:46:13,442 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 574 transitions. Word has length 19 [2021-07-09 18:46:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:13,442 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 574 transitions. [2021-07-09 18:46:13,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 574 transitions. [2021-07-09 18:46:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:13,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:13,443 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:13,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 18:46:13,661 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563943, now seen corresponding path program 23 times [2021-07-09 18:46:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797484705] [2021-07-09 18:46:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:13,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:13,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797484705] [2021-07-09 18:46:13,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797484705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:13,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970411583] [2021-07-09 18:46:13,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:13,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:13,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:13,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:13,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970411583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:13,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:13,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:13,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265008492] [2021-07-09 18:46:13,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:13,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:13,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:13,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:13,934 INFO L87 Difference]: Start difference. First operand 246 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:14,398 INFO L93 Difference]: Finished difference Result 388 states and 906 transitions. [2021-07-09 18:46:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:46:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:14,400 INFO L225 Difference]: With dead ends: 388 [2021-07-09 18:46:14,400 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 18:46:14,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:46:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 18:46:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 256. [2021-07-09 18:46:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.392156862745098) internal successors, (610), 255 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 610 transitions. [2021-07-09 18:46:14,405 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 610 transitions. Word has length 19 [2021-07-09 18:46:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:14,405 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 610 transitions. [2021-07-09 18:46:14,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 610 transitions. [2021-07-09 18:46:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:14,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:14,406 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:14,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:14,621 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1247703337, now seen corresponding path program 24 times [2021-07-09 18:46:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:14,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520113704] [2021-07-09 18:46:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:14,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:14,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520113704] [2021-07-09 18:46:14,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520113704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:14,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540641128] [2021-07-09 18:46:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:14,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:46:14,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:14,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:14,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540641128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:14,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:14,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:14,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384876419] [2021-07-09 18:46:14,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:14,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:14,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:14,907 INFO L87 Difference]: Start difference. First operand 256 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:15,172 INFO L93 Difference]: Finished difference Result 361 states and 831 transitions. [2021-07-09 18:46:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:46:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:15,174 INFO L225 Difference]: With dead ends: 361 [2021-07-09 18:46:15,174 INFO L226 Difference]: Without dead ends: 344 [2021-07-09 18:46:15,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:46:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-09 18:46:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 291. [2021-07-09 18:46:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.406896551724138) internal successors, (698), 290 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 698 transitions. [2021-07-09 18:46:15,178 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 698 transitions. Word has length 19 [2021-07-09 18:46:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:15,178 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 698 transitions. [2021-07-09 18:46:15,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 698 transitions. [2021-07-09 18:46:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:15,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:15,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:15,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:46:15,382 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193749, now seen corresponding path program 25 times [2021-07-09 18:46:15,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:15,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409036984] [2021-07-09 18:46:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:15,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:15,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409036984] [2021-07-09 18:46:15,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409036984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:15,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689726332] [2021-07-09 18:46:15,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689726332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268893560] [2021-07-09 18:46:15,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:15,680 INFO L87 Difference]: Start difference. First operand 291 states and 698 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:16,097 INFO L93 Difference]: Finished difference Result 506 states and 1196 transitions. [2021-07-09 18:46:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:46:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:16,099 INFO L225 Difference]: With dead ends: 506 [2021-07-09 18:46:16,099 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 18:46:16,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:46:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 18:46:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 330. [2021-07-09 18:46:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3951367781155017) internal successors, (788), 329 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 788 transitions. [2021-07-09 18:46:16,107 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 788 transitions. Word has length 19 [2021-07-09 18:46:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:16,107 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 788 transitions. [2021-07-09 18:46:16,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 788 transitions. [2021-07-09 18:46:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:16,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:16,108 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:16,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:16,313 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash 687948011, now seen corresponding path program 26 times [2021-07-09 18:46:16,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:16,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205672018] [2021-07-09 18:46:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:16,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:16,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205672018] [2021-07-09 18:46:16,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205672018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325464874] [2021-07-09 18:46:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:16,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:16,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325464874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:16,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385330152] [2021-07-09 18:46:16,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:16,625 INFO L87 Difference]: Start difference. First operand 330 states and 788 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:17,034 INFO L93 Difference]: Finished difference Result 456 states and 1025 transitions. [2021-07-09 18:46:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:46:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:17,036 INFO L225 Difference]: With dead ends: 456 [2021-07-09 18:46:17,036 INFO L226 Difference]: Without dead ends: 436 [2021-07-09 18:46:17,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:46:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-09 18:46:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 335. [2021-07-09 18:46:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.3652694610778444) internal successors, (790), 334 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 790 transitions. [2021-07-09 18:46:17,043 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 790 transitions. Word has length 19 [2021-07-09 18:46:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:17,043 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 790 transitions. [2021-07-09 18:46:17,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 790 transitions. [2021-07-09 18:46:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:17,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:17,044 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:17,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:46:17,265 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -332621849, now seen corresponding path program 27 times [2021-07-09 18:46:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:17,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922934560] [2021-07-09 18:46:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:17,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922934560] [2021-07-09 18:46:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922934560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342401638] [2021-07-09 18:46:17,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:17,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:46:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342401638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:17,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:17,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597661069] [2021-07-09 18:46:17,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:17,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:17,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:17,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:17,554 INFO L87 Difference]: Start difference. First operand 335 states and 790 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:17,789 INFO L93 Difference]: Finished difference Result 389 states and 881 transitions. [2021-07-09 18:46:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:17,791 INFO L225 Difference]: With dead ends: 389 [2021-07-09 18:46:17,791 INFO L226 Difference]: Without dead ends: 370 [2021-07-09 18:46:17,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:46:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-09 18:46:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-07-09 18:46:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3717105263157894) internal successors, (721), 304 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 721 transitions. [2021-07-09 18:46:17,797 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 721 transitions. Word has length 19 [2021-07-09 18:46:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:17,797 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 721 transitions. [2021-07-09 18:46:17,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 721 transitions. [2021-07-09 18:46:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:17,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:17,798 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:18,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:18,017 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1873029991, now seen corresponding path program 28 times [2021-07-09 18:46:18,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:18,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648526510] [2021-07-09 18:46:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:18,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648526510] [2021-07-09 18:46:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648526510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577589302] [2021-07-09 18:46:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:18,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:18,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:18,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:18,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577589302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:18,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:18,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:18,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268228799] [2021-07-09 18:46:18,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:18,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:18,296 INFO L87 Difference]: Start difference. First operand 305 states and 721 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:18,560 INFO L93 Difference]: Finished difference Result 348 states and 785 transitions. [2021-07-09 18:46:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:18,561 INFO L225 Difference]: With dead ends: 348 [2021-07-09 18:46:18,561 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 18:46:18,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:46:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 18:46:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2021-07-09 18:46:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.36) internal successors, (708), 300 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 708 transitions. [2021-07-09 18:46:18,567 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 708 transitions. Word has length 19 [2021-07-09 18:46:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:18,567 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 708 transitions. [2021-07-09 18:46:18,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 708 transitions. [2021-07-09 18:46:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:18,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:18,568 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:18,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:46:18,777 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 264714809, now seen corresponding path program 29 times [2021-07-09 18:46:18,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:18,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253709957] [2021-07-09 18:46:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:18,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253709957] [2021-07-09 18:46:18,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253709957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87995603] [2021-07-09 18:46:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:18,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:18,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87995603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:19,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611437131] [2021-07-09 18:46:19,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:19,047 INFO L87 Difference]: Start difference. First operand 301 states and 708 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:19,445 INFO L93 Difference]: Finished difference Result 332 states and 757 transitions. [2021-07-09 18:46:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:46:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:19,447 INFO L225 Difference]: With dead ends: 332 [2021-07-09 18:46:19,447 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 18:46:19,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:46:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 18:46:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2021-07-09 18:46:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.3488372093023258) internal successors, (707), 301 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 707 transitions. [2021-07-09 18:46:19,453 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 707 transitions. Word has length 19 [2021-07-09 18:46:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:19,453 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 707 transitions. [2021-07-09 18:46:19,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 707 transitions. [2021-07-09 18:46:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:19,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:19,454 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:19,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:46:19,673 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1254323989, now seen corresponding path program 30 times [2021-07-09 18:46:19,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:19,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911666678] [2021-07-09 18:46:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:19,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911666678] [2021-07-09 18:46:19,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911666678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789243602] [2021-07-09 18:46:19,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:19,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:46:19,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:19,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789243602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:19,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:46:19,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458443823] [2021-07-09 18:46:19,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:19,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:19,942 INFO L87 Difference]: Start difference. First operand 302 states and 707 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:20,115 INFO L93 Difference]: Finished difference Result 335 states and 755 transitions. [2021-07-09 18:46:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:20,117 INFO L225 Difference]: With dead ends: 335 [2021-07-09 18:46:20,117 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 18:46:20,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 18:46:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2021-07-09 18:46:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.321070234113712) internal successors, (694), 299 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 694 transitions. [2021-07-09 18:46:20,122 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 694 transitions. Word has length 19 [2021-07-09 18:46:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:20,122 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 694 transitions. [2021-07-09 18:46:20,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 694 transitions. [2021-07-09 18:46:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:20,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:20,123 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:20,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:20,333 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1786837659, now seen corresponding path program 31 times [2021-07-09 18:46:20,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:20,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038977416] [2021-07-09 18:46:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:20,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:20,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038977416] [2021-07-09 18:46:20,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038977416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:20,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093387183] [2021-07-09 18:46:20,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093387183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:20,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:20,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466039445] [2021-07-09 18:46:20,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:20,654 INFO L87 Difference]: Start difference. First operand 300 states and 694 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:21,061 INFO L93 Difference]: Finished difference Result 452 states and 1035 transitions. [2021-07-09 18:46:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:46:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:21,063 INFO L225 Difference]: With dead ends: 452 [2021-07-09 18:46:21,063 INFO L226 Difference]: Without dead ends: 434 [2021-07-09 18:46:21,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:46:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-09 18:46:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 342. [2021-07-09 18:46:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.3870967741935485) internal successors, (814), 341 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 814 transitions. [2021-07-09 18:46:21,070 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 814 transitions. Word has length 19 [2021-07-09 18:46:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:21,070 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 814 transitions. [2021-07-09 18:46:21,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 814 transitions. [2021-07-09 18:46:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:21,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:21,071 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:21,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:46:21,289 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1586221843, now seen corresponding path program 32 times [2021-07-09 18:46:21,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:21,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674671570] [2021-07-09 18:46:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:21,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:21,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674671570] [2021-07-09 18:46:21,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674671570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:21,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73950389] [2021-07-09 18:46:21,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:21,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:21,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73950389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:21,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:21,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733702747] [2021-07-09 18:46:21,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:21,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:21,596 INFO L87 Difference]: Start difference. First operand 342 states and 814 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:22,035 INFO L93 Difference]: Finished difference Result 461 states and 1071 transitions. [2021-07-09 18:46:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:46:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:22,038 INFO L225 Difference]: With dead ends: 461 [2021-07-09 18:46:22,038 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 18:46:22,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:46:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 18:46:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-07-09 18:46:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-07-09 18:46:22,045 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-07-09 18:46:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:22,045 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-07-09 18:46:22,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-07-09 18:46:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:22,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:22,046 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:22,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:22,261 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1657537633, now seen corresponding path program 33 times [2021-07-09 18:46:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:22,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700758256] [2021-07-09 18:46:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:22,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700758256] [2021-07-09 18:46:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700758256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107889930] [2021-07-09 18:46:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:22,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:22,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107889930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:22,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:22,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827735618] [2021-07-09 18:46:22,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:22,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:22,576 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:22,835 INFO L93 Difference]: Finished difference Result 411 states and 955 transitions. [2021-07-09 18:46:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:46:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:22,836 INFO L225 Difference]: With dead ends: 411 [2021-07-09 18:46:22,836 INFO L226 Difference]: Without dead ends: 389 [2021-07-09 18:46:22,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:46:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-09 18:46:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-07-09 18:46:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.398876404494382) internal successors, (854), 356 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 854 transitions. [2021-07-09 18:46:22,846 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 854 transitions. Word has length 19 [2021-07-09 18:46:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:22,847 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 854 transitions. [2021-07-09 18:46:22,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 854 transitions. [2021-07-09 18:46:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:22,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:22,848 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:46:23,061 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1886028755, now seen corresponding path program 34 times [2021-07-09 18:46:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328248820] [2021-07-09 18:46:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328248820] [2021-07-09 18:46:23,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328248820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579128187] [2021-07-09 18:46:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:23,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:23,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579128187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:23,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502897778] [2021-07-09 18:46:23,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:23,346 INFO L87 Difference]: Start difference. First operand 357 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:23,638 INFO L93 Difference]: Finished difference Result 410 states and 952 transitions. [2021-07-09 18:46:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:46:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:23,640 INFO L225 Difference]: With dead ends: 410 [2021-07-09 18:46:23,640 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 18:46:23,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:46:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 18:46:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 359. [2021-07-09 18:46:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.393854748603352) internal successors, (857), 358 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 857 transitions. [2021-07-09 18:46:23,644 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 857 transitions. Word has length 19 [2021-07-09 18:46:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:23,644 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 857 transitions. [2021-07-09 18:46:23,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 857 transitions. [2021-07-09 18:46:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:23,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:23,645 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:23,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:46:23,845 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1752716457, now seen corresponding path program 35 times [2021-07-09 18:46:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:23,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927039703] [2021-07-09 18:46:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927039703] [2021-07-09 18:46:23,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927039703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318069004] [2021-07-09 18:46:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:23,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:23,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:23,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318069004] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:24,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:24,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:24,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124157128] [2021-07-09 18:46:24,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:24,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:24,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:24,106 INFO L87 Difference]: Start difference. First operand 359 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:24,188 INFO L93 Difference]: Finished difference Result 398 states and 924 transitions. [2021-07-09 18:46:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:46:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:24,190 INFO L225 Difference]: With dead ends: 398 [2021-07-09 18:46:24,190 INFO L226 Difference]: Without dead ends: 386 [2021-07-09 18:46:24,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-09 18:46:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 354. [2021-07-09 18:46:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-07-09 18:46:24,195 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-07-09 18:46:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:24,195 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-07-09 18:46:24,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-07-09 18:46:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:24,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:24,196 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:24,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:24,418 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1532889265, now seen corresponding path program 36 times [2021-07-09 18:46:24,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:24,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010393236] [2021-07-09 18:46:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:24,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010393236] [2021-07-09 18:46:24,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010393236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:24,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570706763] [2021-07-09 18:46:24,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:24,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:24,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:24,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570706763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:24,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:24,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:24,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249804606] [2021-07-09 18:46:24,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:24,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:24,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:24,705 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:25,370 INFO L93 Difference]: Finished difference Result 601 states and 1374 transitions. [2021-07-09 18:46:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:46:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:25,372 INFO L225 Difference]: With dead ends: 601 [2021-07-09 18:46:25,372 INFO L226 Difference]: Without dead ends: 568 [2021-07-09 18:46:25,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:46:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-09 18:46:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-07-09 18:46:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4005037783375314) internal successors, (953), 397 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 953 transitions. [2021-07-09 18:46:25,378 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 953 transitions. Word has length 19 [2021-07-09 18:46:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:25,378 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 953 transitions. [2021-07-09 18:46:25,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 953 transitions. [2021-07-09 18:46:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:25,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:25,379 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:25,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:46:25,601 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash -471317365, now seen corresponding path program 37 times [2021-07-09 18:46:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:25,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740252069] [2021-07-09 18:46:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:25,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:25,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740252069] [2021-07-09 18:46:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740252069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487718870] [2021-07-09 18:46:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:25,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:25,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487718870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:25,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:25,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:25,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167606825] [2021-07-09 18:46:25,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:25,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:25,889 INFO L87 Difference]: Start difference. First operand 398 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:26,091 INFO L93 Difference]: Finished difference Result 435 states and 1013 transitions. [2021-07-09 18:46:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:26,092 INFO L225 Difference]: With dead ends: 435 [2021-07-09 18:46:26,092 INFO L226 Difference]: Without dead ends: 416 [2021-07-09 18:46:26,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:46:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-09 18:46:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 398. [2021-07-09 18:46:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.395465994962217) internal successors, (951), 397 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 951 transitions. [2021-07-09 18:46:26,097 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 951 transitions. Word has length 19 [2021-07-09 18:46:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:26,098 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 951 transitions. [2021-07-09 18:46:26,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 951 transitions. [2021-07-09 18:46:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:26,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:26,099 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:26,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:26,313 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1274029861, now seen corresponding path program 38 times [2021-07-09 18:46:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:26,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846113394] [2021-07-09 18:46:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:26,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846113394] [2021-07-09 18:46:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846113394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:26,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831804913] [2021-07-09 18:46:26,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:26,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:26,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831804913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:26,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:26,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:26,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357691520] [2021-07-09 18:46:26,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:26,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:26,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:26,624 INFO L87 Difference]: Start difference. First operand 398 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:27,029 INFO L93 Difference]: Finished difference Result 532 states and 1221 transitions. [2021-07-09 18:46:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:46:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:27,032 INFO L225 Difference]: With dead ends: 532 [2021-07-09 18:46:27,032 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 18:46:27,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:46:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 18:46:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-07-09 18:46:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.3914141414141414) internal successors, (947), 396 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 947 transitions. [2021-07-09 18:46:27,038 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 947 transitions. Word has length 19 [2021-07-09 18:46:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:27,038 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 947 transitions. [2021-07-09 18:46:27,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 947 transitions. [2021-07-09 18:46:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:27,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:27,039 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:27,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:46:27,253 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1464333983, now seen corresponding path program 39 times [2021-07-09 18:46:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:27,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205443455] [2021-07-09 18:46:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205443455] [2021-07-09 18:46:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205443455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729070597] [2021-07-09 18:46:27,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:27,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:46:27,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729070597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760666685] [2021-07-09 18:46:27,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:27,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:27,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:27,529 INFO L87 Difference]: Start difference. First operand 397 states and 947 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:27,975 INFO L93 Difference]: Finished difference Result 528 states and 1212 transitions. [2021-07-09 18:46:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:46:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:27,978 INFO L225 Difference]: With dead ends: 528 [2021-07-09 18:46:27,978 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 18:46:27,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:46:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 18:46:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-07-09 18:46:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.385) internal successors, (954), 400 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 954 transitions. [2021-07-09 18:46:27,986 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 954 transitions. Word has length 19 [2021-07-09 18:46:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:27,986 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 954 transitions. [2021-07-09 18:46:27,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 954 transitions. [2021-07-09 18:46:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:27,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:27,987 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:28,201 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 389426617, now seen corresponding path program 40 times [2021-07-09 18:46:28,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796123895] [2021-07-09 18:46:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:28,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:28,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796123895] [2021-07-09 18:46:28,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796123895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124186958] [2021-07-09 18:46:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:28,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124186958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:28,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:28,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:28,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801147347] [2021-07-09 18:46:28,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:28,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:28,500 INFO L87 Difference]: Start difference. First operand 401 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:28,881 INFO L93 Difference]: Finished difference Result 457 states and 1041 transitions. [2021-07-09 18:46:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:46:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:28,883 INFO L225 Difference]: With dead ends: 457 [2021-07-09 18:46:28,883 INFO L226 Difference]: Without dead ends: 440 [2021-07-09 18:46:28,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:46:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-09 18:46:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-07-09 18:46:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.374064837905237) internal successors, (952), 401 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 952 transitions. [2021-07-09 18:46:28,893 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 952 transitions. Word has length 19 [2021-07-09 18:46:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:28,893 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 952 transitions. [2021-07-09 18:46:28,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 952 transitions. [2021-07-09 18:46:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:28,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:28,894 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:29,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:29,109 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1430558513, now seen corresponding path program 41 times [2021-07-09 18:46:29,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:29,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163504323] [2021-07-09 18:46:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:29,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:29,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163504323] [2021-07-09 18:46:29,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163504323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:29,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195006041] [2021-07-09 18:46:29,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:29,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:29,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195006041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:29,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:29,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738547202] [2021-07-09 18:46:29,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:29,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:29,355 INFO L87 Difference]: Start difference. First operand 402 states and 952 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:29,597 INFO L93 Difference]: Finished difference Result 474 states and 1095 transitions. [2021-07-09 18:46:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:29,599 INFO L225 Difference]: With dead ends: 474 [2021-07-09 18:46:29,599 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 18:46:29,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:46:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 18:46:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 395. [2021-07-09 18:46:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.3756345177664975) internal successors, (936), 394 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 936 transitions. [2021-07-09 18:46:29,605 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 936 transitions. Word has length 19 [2021-07-09 18:46:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:29,605 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 936 transitions. [2021-07-09 18:46:29,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 936 transitions. [2021-07-09 18:46:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:29,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:29,606 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:29,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 18:46:29,821 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash 11172077, now seen corresponding path program 42 times [2021-07-09 18:46:29,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:29,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391503160] [2021-07-09 18:46:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391503160] [2021-07-09 18:46:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391503160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076602268] [2021-07-09 18:46:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:29,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:46:29,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:29,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076602268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:30,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:30,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614785360] [2021-07-09 18:46:30,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:30,109 INFO L87 Difference]: Start difference. First operand 395 states and 936 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:30,370 INFO L93 Difference]: Finished difference Result 505 states and 1159 transitions. [2021-07-09 18:46:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:30,372 INFO L225 Difference]: With dead ends: 505 [2021-07-09 18:46:30,372 INFO L226 Difference]: Without dead ends: 492 [2021-07-09 18:46:30,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-09 18:46:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 414. [2021-07-09 18:46:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.375302663438257) internal successors, (981), 413 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 981 transitions. [2021-07-09 18:46:30,377 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 981 transitions. Word has length 19 [2021-07-09 18:46:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:30,377 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 981 transitions. [2021-07-09 18:46:30,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 981 transitions. [2021-07-09 18:46:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:30,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:30,378 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:30,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:30,579 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 735553785, now seen corresponding path program 43 times [2021-07-09 18:46:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:30,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846918057] [2021-07-09 18:46:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846918057] [2021-07-09 18:46:30,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846918057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799136375] [2021-07-09 18:46:30,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799136375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:30,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:30,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386266915] [2021-07-09 18:46:30,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:30,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:30,861 INFO L87 Difference]: Start difference. First operand 414 states and 981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:31,051 INFO L93 Difference]: Finished difference Result 489 states and 1127 transitions. [2021-07-09 18:46:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:31,052 INFO L225 Difference]: With dead ends: 489 [2021-07-09 18:46:31,053 INFO L226 Difference]: Without dead ends: 469 [2021-07-09 18:46:31,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:46:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-09 18:46:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2021-07-09 18:46:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.3755760368663594) internal successors, (1031), 434 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1031 transitions. [2021-07-09 18:46:31,058 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1031 transitions. Word has length 19 [2021-07-09 18:46:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:31,058 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1031 transitions. [2021-07-09 18:46:31,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1031 transitions. [2021-07-09 18:46:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:31,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:31,059 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:31,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:46:31,260 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash 589063373, now seen corresponding path program 44 times [2021-07-09 18:46:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:31,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785434792] [2021-07-09 18:46:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785434792] [2021-07-09 18:46:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785434792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420789755] [2021-07-09 18:46:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:31,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420789755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:31,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:31,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:31,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716221076] [2021-07-09 18:46:31,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:31,537 INFO L87 Difference]: Start difference. First operand 435 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:31,801 INFO L93 Difference]: Finished difference Result 623 states and 1481 transitions. [2021-07-09 18:46:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:31,804 INFO L225 Difference]: With dead ends: 623 [2021-07-09 18:46:31,804 INFO L226 Difference]: Without dead ends: 609 [2021-07-09 18:46:31,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-07-09 18:46:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 521. [2021-07-09 18:46:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.4288461538461537) internal successors, (1263), 520 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1263 transitions. [2021-07-09 18:46:31,814 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1263 transitions. Word has length 19 [2021-07-09 18:46:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1263 transitions. [2021-07-09 18:46:31,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1263 transitions. [2021-07-09 18:46:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:31,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:31,814 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:32,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:32,015 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -737202913, now seen corresponding path program 45 times [2021-07-09 18:46:32,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:32,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327086888] [2021-07-09 18:46:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:32,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327086888] [2021-07-09 18:46:32,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327086888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621664710] [2021-07-09 18:46:32,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:32,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:32,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621664710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:32,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:32,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:32,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167079838] [2021-07-09 18:46:32,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:32,309 INFO L87 Difference]: Start difference. First operand 521 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:32,578 INFO L93 Difference]: Finished difference Result 570 states and 1340 transitions. [2021-07-09 18:46:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:32,580 INFO L225 Difference]: With dead ends: 570 [2021-07-09 18:46:32,580 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 18:46:32,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:46:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 18:46:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 480. [2021-07-09 18:46:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-07-09 18:46:32,586 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 19 [2021-07-09 18:46:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:32,586 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-07-09 18:46:32,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-07-09 18:46:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:32,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:32,587 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:32,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:46:32,787 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:32,788 INFO L82 PathProgramCache]: Analyzing trace with hash -67158711, now seen corresponding path program 46 times [2021-07-09 18:46:32,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:32,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865103045] [2021-07-09 18:46:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:32,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865103045] [2021-07-09 18:46:32,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865103045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:32,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411228321] [2021-07-09 18:46:32,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:32,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:32,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:32,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411228321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795283336] [2021-07-09 18:46:33,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:33,042 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:33,588 INFO L93 Difference]: Finished difference Result 737 states and 1672 transitions. [2021-07-09 18:46:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:46:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:33,591 INFO L225 Difference]: With dead ends: 737 [2021-07-09 18:46:33,591 INFO L226 Difference]: Without dead ends: 718 [2021-07-09 18:46:33,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:46:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-07-09 18:46:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 533. [2021-07-09 18:46:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.3477443609022557) internal successors, (1249), 532 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1249 transitions. [2021-07-09 18:46:33,598 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1249 transitions. Word has length 19 [2021-07-09 18:46:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:33,598 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1249 transitions. [2021-07-09 18:46:33,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1249 transitions. [2021-07-09 18:46:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:33,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:33,599 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:33,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:46:33,800 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 338508243, now seen corresponding path program 47 times [2021-07-09 18:46:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:33,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892318663] [2021-07-09 18:46:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:33,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892318663] [2021-07-09 18:46:33,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892318663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489484265] [2021-07-09 18:46:33,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:33,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489484265] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:34,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:34,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:34,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104276842] [2021-07-09 18:46:34,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:34,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:34,058 INFO L87 Difference]: Start difference. First operand 533 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:34,181 INFO L93 Difference]: Finished difference Result 675 states and 1555 transitions. [2021-07-09 18:46:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:34,183 INFO L225 Difference]: With dead ends: 675 [2021-07-09 18:46:34,184 INFO L226 Difference]: Without dead ends: 660 [2021-07-09 18:46:34,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:46:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-07-09 18:46:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 390. [2021-07-09 18:46:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3059125964010283) internal successors, (897), 389 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 897 transitions. [2021-07-09 18:46:34,190 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 897 transitions. Word has length 19 [2021-07-09 18:46:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:34,190 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 897 transitions. [2021-07-09 18:46:34,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 897 transitions. [2021-07-09 18:46:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:34,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:34,191 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:34,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:34,399 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1596297767, now seen corresponding path program 48 times [2021-07-09 18:46:34,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:34,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977958017] [2021-07-09 18:46:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:34,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977958017] [2021-07-09 18:46:34,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977958017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658502247] [2021-07-09 18:46:34,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:34,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:46:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658502247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:34,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:34,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221543859] [2021-07-09 18:46:34,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:34,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:34,686 INFO L87 Difference]: Start difference. First operand 390 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:35,393 INFO L93 Difference]: Finished difference Result 552 states and 1225 transitions. [2021-07-09 18:46:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:46:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:35,396 INFO L225 Difference]: With dead ends: 552 [2021-07-09 18:46:35,396 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 18:46:35,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:46:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 18:46:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 431. [2021-07-09 18:46:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3232558139534882) internal successors, (999), 430 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 999 transitions. [2021-07-09 18:46:35,404 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 999 transitions. Word has length 19 [2021-07-09 18:46:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:35,404 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 999 transitions. [2021-07-09 18:46:35,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 999 transitions. [2021-07-09 18:46:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:35,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:35,405 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:35,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:46:35,605 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1320337189, now seen corresponding path program 49 times [2021-07-09 18:46:35,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:35,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846639406] [2021-07-09 18:46:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:35,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:35,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846639406] [2021-07-09 18:46:35,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846639406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:35,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998450222] [2021-07-09 18:46:35,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:35,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998450222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:35,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:35,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769543803] [2021-07-09 18:46:35,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:35,882 INFO L87 Difference]: Start difference. First operand 431 states and 999 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:36,136 INFO L93 Difference]: Finished difference Result 490 states and 1117 transitions. [2021-07-09 18:46:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:36,139 INFO L225 Difference]: With dead ends: 490 [2021-07-09 18:46:36,139 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 18:46:36,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 18:46:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-07-09 18:46:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.278481012658228) internal successors, (900), 395 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 900 transitions. [2021-07-09 18:46:36,145 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 900 transitions. Word has length 19 [2021-07-09 18:46:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:36,145 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 900 transitions. [2021-07-09 18:46:36,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 900 transitions. [2021-07-09 18:46:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:36,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:36,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:36,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:36,347 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1648363821, now seen corresponding path program 50 times [2021-07-09 18:46:36,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:36,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437958337] [2021-07-09 18:46:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437958337] [2021-07-09 18:46:36,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437958337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387758044] [2021-07-09 18:46:36,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:36,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:36,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387758044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:36,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156464234] [2021-07-09 18:46:36,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:36,621 INFO L87 Difference]: Start difference. First operand 396 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:36,875 INFO L93 Difference]: Finished difference Result 448 states and 1001 transitions. [2021-07-09 18:46:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:36,877 INFO L225 Difference]: With dead ends: 448 [2021-07-09 18:46:36,877 INFO L226 Difference]: Without dead ends: 434 [2021-07-09 18:46:36,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:46:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-09 18:46:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-07-09 18:46:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.197986577181208) internal successors, (655), 298 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 655 transitions. [2021-07-09 18:46:36,883 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 655 transitions. Word has length 19 [2021-07-09 18:46:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:36,883 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 655 transitions. [2021-07-09 18:46:36,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 655 transitions. [2021-07-09 18:46:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:36,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:36,884 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:37,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,089 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1976559273, now seen corresponding path program 51 times [2021-07-09 18:46:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:37,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117839575] [2021-07-09 18:46:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117839575] [2021-07-09 18:46:37,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117839575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818532459] [2021-07-09 18:46:37,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:37,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818532459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:37,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:37,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634740403] [2021-07-09 18:46:37,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:37,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:37,366 INFO L87 Difference]: Start difference. First operand 299 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:37,626 INFO L93 Difference]: Finished difference Result 337 states and 722 transitions. [2021-07-09 18:46:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:37,628 INFO L225 Difference]: With dead ends: 337 [2021-07-09 18:46:37,628 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 18:46:37,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 18:46:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2021-07-09 18:46:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.195945945945946) internal successors, (650), 296 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 650 transitions. [2021-07-09 18:46:37,632 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 650 transitions. Word has length 19 [2021-07-09 18:46:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:37,632 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 650 transitions. [2021-07-09 18:46:37,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 650 transitions. [2021-07-09 18:46:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:37,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:37,633 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:37,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,837 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash -900848117, now seen corresponding path program 52 times [2021-07-09 18:46:37,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:37,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87900036] [2021-07-09 18:46:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:37,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87900036] [2021-07-09 18:46:37,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87900036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883683811] [2021-07-09 18:46:37,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:37,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:38,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883683811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:38,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:38,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582235297] [2021-07-09 18:46:38,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:38,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:38,124 INFO L87 Difference]: Start difference. First operand 297 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:39,111 INFO L93 Difference]: Finished difference Result 546 states and 1150 transitions. [2021-07-09 18:46:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:46:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:39,112 INFO L225 Difference]: With dead ends: 546 [2021-07-09 18:46:39,112 INFO L226 Difference]: Without dead ends: 527 [2021-07-09 18:46:39,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:46:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-09 18:46:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 330. [2021-07-09 18:46:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2036474164133737) internal successors, (725), 329 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 725 transitions. [2021-07-09 18:46:39,118 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 725 transitions. Word has length 19 [2021-07-09 18:46:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:39,119 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 725 transitions. [2021-07-09 18:46:39,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 725 transitions. [2021-07-09 18:46:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:39,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:39,119 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:39,337 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -258765289, now seen corresponding path program 53 times [2021-07-09 18:46:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:39,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699431848] [2021-07-09 18:46:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:39,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699431848] [2021-07-09 18:46:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699431848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723023022] [2021-07-09 18:46:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:39,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:39,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:39,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723023022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:39,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:39,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430854316] [2021-07-09 18:46:39,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:39,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:39,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:39,652 INFO L87 Difference]: Start difference. First operand 330 states and 725 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:39,876 INFO L93 Difference]: Finished difference Result 370 states and 790 transitions. [2021-07-09 18:46:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:39,877 INFO L225 Difference]: With dead ends: 370 [2021-07-09 18:46:39,877 INFO L226 Difference]: Without dead ends: 349 [2021-07-09 18:46:39,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:46:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-09 18:46:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 301. [2021-07-09 18:46:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.183333333333333) internal successors, (655), 300 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 655 transitions. [2021-07-09 18:46:39,881 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 655 transitions. Word has length 19 [2021-07-09 18:46:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:39,881 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 655 transitions. [2021-07-09 18:46:39,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 655 transitions. [2021-07-09 18:46:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:39,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:39,882 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:40,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:40,106 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -385810339, now seen corresponding path program 54 times [2021-07-09 18:46:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:40,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061674276] [2021-07-09 18:46:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061674276] [2021-07-09 18:46:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061674276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012698163] [2021-07-09 18:46:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:40,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:46:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012698163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778121353] [2021-07-09 18:46:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:40,439 INFO L87 Difference]: Start difference. First operand 301 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:40,758 INFO L93 Difference]: Finished difference Result 354 states and 743 transitions. [2021-07-09 18:46:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:46:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:40,760 INFO L225 Difference]: With dead ends: 354 [2021-07-09 18:46:40,760 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 18:46:40,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:46:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 18:46:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2021-07-09 18:46:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.1824324324324325) internal successors, (646), 296 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 646 transitions. [2021-07-09 18:46:40,766 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 646 transitions. Word has length 19 [2021-07-09 18:46:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:40,766 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 646 transitions. [2021-07-09 18:46:40,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:40,767 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 646 transitions. [2021-07-09 18:46:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:40,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:40,767 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:40,981 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash 529271149, now seen corresponding path program 55 times [2021-07-09 18:46:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707409519] [2021-07-09 18:46:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:41,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707409519] [2021-07-09 18:46:41,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707409519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:41,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206385789] [2021-07-09 18:46:41,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:41,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206385789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:41,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:41,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:41,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281934299] [2021-07-09 18:46:41,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:41,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:41,299 INFO L87 Difference]: Start difference. First operand 297 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:41,457 INFO L93 Difference]: Finished difference Result 323 states and 685 transitions. [2021-07-09 18:46:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:41,458 INFO L225 Difference]: With dead ends: 323 [2021-07-09 18:46:41,458 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 18:46:41,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:46:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 18:46:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-07-09 18:46:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1824817518248176) internal successors, (598), 274 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 598 transitions. [2021-07-09 18:46:41,463 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 598 transitions. Word has length 19 [2021-07-09 18:46:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:41,463 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 598 transitions. [2021-07-09 18:46:41,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 598 transitions. [2021-07-09 18:46:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:41,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:41,464 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:41,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 18:46:41,669 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1199315351, now seen corresponding path program 56 times [2021-07-09 18:46:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:41,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175945445] [2021-07-09 18:46:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:41,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175945445] [2021-07-09 18:46:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175945445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359049811] [2021-07-09 18:46:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:41,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:41,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359049811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:41,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:41,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:41,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16830406] [2021-07-09 18:46:41,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:41,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:41,939 INFO L87 Difference]: Start difference. First operand 275 states and 598 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:42,100 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2021-07-09 18:46:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:42,101 INFO L225 Difference]: With dead ends: 299 [2021-07-09 18:46:42,101 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 18:46:42,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:46:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 18:46:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2021-07-09 18:46:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1846153846153844) internal successors, (568), 260 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 568 transitions. [2021-07-09 18:46:42,106 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 568 transitions. Word has length 19 [2021-07-09 18:46:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:42,106 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 568 transitions. [2021-07-09 18:46:42,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 568 transitions. [2021-07-09 18:46:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:42,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:42,106 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:42,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:42,313 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1432999257, now seen corresponding path program 57 times [2021-07-09 18:46:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:42,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279279622] [2021-07-09 18:46:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:42,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279279622] [2021-07-09 18:46:42,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279279622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500663090] [2021-07-09 18:46:42,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:42,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:46:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:42,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500663090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:42,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:42,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:46:42,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160331709] [2021-07-09 18:46:42,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:46:42,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:46:42,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:42,631 INFO L87 Difference]: Start difference. First operand 261 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:42,809 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-07-09 18:46:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:42,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:42,810 INFO L225 Difference]: With dead ends: 282 [2021-07-09 18:46:42,810 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 18:46:42,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 18:46:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-07-09 18:46:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-07-09 18:46:42,814 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-07-09 18:46:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:42,815 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-07-09 18:46:42,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-07-09 18:46:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:42,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:42,815 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:43,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:46:43,039 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash -265385941, now seen corresponding path program 58 times [2021-07-09 18:46:43,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:43,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22145679] [2021-07-09 18:46:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:43,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22145679] [2021-07-09 18:46:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22145679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263519652] [2021-07-09 18:46:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:43,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:46:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263519652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:43,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:46:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788389559] [2021-07-09 18:46:43,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:46:43,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:46:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:43,288 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:43,726 INFO L93 Difference]: Finished difference Result 319 states and 675 transitions. [2021-07-09 18:46:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:46:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:43,727 INFO L225 Difference]: With dead ends: 319 [2021-07-09 18:46:43,727 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 18:46:43,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:46:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 18:46:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-07-09 18:46:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-07-09 18:46:43,730 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-07-09 18:46:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:43,730 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-07-09 18:46:43,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-07-09 18:46:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:46:43,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:43,731 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:43,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:43,931 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1815085655, now seen corresponding path program 59 times [2021-07-09 18:46:43,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:43,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620051967] [2021-07-09 18:46:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620051967] [2021-07-09 18:46:44,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620051967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294077355] [2021-07-09 18:46:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:44,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294077355] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:44,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:44,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-07-09 18:46:44,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779961875] [2021-07-09 18:46:44,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:44,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:44,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:44,167 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:44,196 INFO L93 Difference]: Finished difference Result 264 states and 566 transitions. [2021-07-09 18:46:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:46:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:46:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:44,197 INFO L225 Difference]: With dead ends: 264 [2021-07-09 18:46:44,197 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 18:46:44,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 18:46:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2021-07-09 18:46:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6764705882352942) internal successors, (285), 170 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 285 transitions. [2021-07-09 18:46:44,199 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 285 transitions. Word has length 19 [2021-07-09 18:46:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:44,199 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 285 transitions. [2021-07-09 18:46:44,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 285 transitions. [2021-07-09 18:46:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:44,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:44,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:44,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,400 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash -477505781, now seen corresponding path program 60 times [2021-07-09 18:46:44,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:44,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468672300] [2021-07-09 18:46:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468672300] [2021-07-09 18:46:44,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468672300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669363429] [2021-07-09 18:46:44,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669363429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:44,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:46:44,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472416112] [2021-07-09 18:46:44,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:46:44,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:46:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:46:44,519 INFO L87 Difference]: Start difference. First operand 171 states and 285 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:44,605 INFO L93 Difference]: Finished difference Result 213 states and 345 transitions. [2021-07-09 18:46:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:46:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:44,606 INFO L225 Difference]: With dead ends: 213 [2021-07-09 18:46:44,606 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 18:46:44,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 18:46:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-07-09 18:46:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-07-09 18:46:44,608 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 21 [2021-07-09 18:46:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:44,608 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-07-09 18:46:44,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-07-09 18:46:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:44,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:44,608 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:44,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,809 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1317377295, now seen corresponding path program 61 times [2021-07-09 18:46:44,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:44,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577111704] [2021-07-09 18:46:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:44,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577111704] [2021-07-09 18:46:44,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577111704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215518552] [2021-07-09 18:46:44,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215518552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:44,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:46:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733160140] [2021-07-09 18:46:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:46:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:46:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:46:44,893 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:44,992 INFO L93 Difference]: Finished difference Result 199 states and 319 transitions. [2021-07-09 18:46:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:46:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:44,993 INFO L225 Difference]: With dead ends: 199 [2021-07-09 18:46:44,993 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 18:46:44,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 18:46:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2021-07-09 18:46:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-07-09 18:46:44,995 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-07-09 18:46:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:44,995 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-07-09 18:46:44,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-07-09 18:46:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:44,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:44,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:45,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:45,220 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash -25018099, now seen corresponding path program 62 times [2021-07-09 18:46:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151179847] [2021-07-09 18:46:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:45,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151179847] [2021-07-09 18:46:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151179847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785771056] [2021-07-09 18:46:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:45,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:46:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:45,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785771056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:45,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:45,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-07-09 18:46:45,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141520217] [2021-07-09 18:46:45,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:45,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:45,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:45,416 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:45,682 INFO L93 Difference]: Finished difference Result 190 states and 305 transitions. [2021-07-09 18:46:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:46:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:45,683 INFO L225 Difference]: With dead ends: 190 [2021-07-09 18:46:45,683 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 18:46:45,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:46:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 18:46:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-07-09 18:46:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-07-09 18:46:45,685 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-07-09 18:46:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:45,685 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-07-09 18:46:45,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-07-09 18:46:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:46:45,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:45,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:45,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 18:46:45,886 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash -856436821, now seen corresponding path program 63 times [2021-07-09 18:46:45,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:45,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382035233] [2021-07-09 18:46:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:45,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:45,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382035233] [2021-07-09 18:46:45,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382035233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:45,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738038722] [2021-07-09 18:46:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:45,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738038722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:46,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:46,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-07-09 18:46:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834291828] [2021-07-09 18:46:46,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:46,072 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:46,607 INFO L93 Difference]: Finished difference Result 203 states and 330 transitions. [2021-07-09 18:46:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:46:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:46:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:46,608 INFO L225 Difference]: With dead ends: 203 [2021-07-09 18:46:46,608 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 18:46:46,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:46:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 18:46:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-07-09 18:46:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6875) internal successors, (243), 144 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2021-07-09 18:46:46,611 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 21 [2021-07-09 18:46:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:46,611 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2021-07-09 18:46:46,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2021-07-09 18:46:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:46,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:46,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:46,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:46,836 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1784149655, now seen corresponding path program 64 times [2021-07-09 18:46:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:46,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425785564] [2021-07-09 18:46:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:46,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:46,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425785564] [2021-07-09 18:46:46,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425785564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:46,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388568365] [2021-07-09 18:46:46,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:46,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:46,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:46:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388568365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:47,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:46:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49150544] [2021-07-09 18:46:47,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:46:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:46:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:47,228 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:47,656 INFO L93 Difference]: Finished difference Result 244 states and 400 transitions. [2021-07-09 18:46:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:46:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:47,656 INFO L225 Difference]: With dead ends: 244 [2021-07-09 18:46:47,656 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 18:46:47,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 541.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:46:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 18:46:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-07-09 18:46:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-07-09 18:46:47,659 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 23 [2021-07-09 18:46:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:47,659 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-07-09 18:46:47,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-07-09 18:46:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:47,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:47,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:47,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:47,860 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2003485607, now seen corresponding path program 65 times [2021-07-09 18:46:47,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:47,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459135967] [2021-07-09 18:46:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459135967] [2021-07-09 18:46:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459135967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996534516] [2021-07-09 18:46:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:48,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:48,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996534516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:48,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:48,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 18:46:48,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627108323] [2021-07-09 18:46:48,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:48,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:48,181 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:48,634 INFO L93 Difference]: Finished difference Result 206 states and 330 transitions. [2021-07-09 18:46:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:46:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:48,634 INFO L225 Difference]: With dead ends: 206 [2021-07-09 18:46:48,634 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 18:46:48,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:46:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 18:46:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-07-09 18:46:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.6312056737588652) internal successors, (230), 141 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2021-07-09 18:46:48,637 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 23 [2021-07-09 18:46:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:48,637 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2021-07-09 18:46:48,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2021-07-09 18:46:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:48,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:48,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:48,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 18:46:48,838 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash 677219321, now seen corresponding path program 66 times [2021-07-09 18:46:48,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:48,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983195204] [2021-07-09 18:46:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:48,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:48,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983195204] [2021-07-09 18:46:48,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983195204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:48,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586290609] [2021-07-09 18:46:48,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:48,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:48,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:48,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586290609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:49,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:49,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:46:49,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100145695] [2021-07-09 18:46:49,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:46:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:46:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:46:49,217 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:49,688 INFO L93 Difference]: Finished difference Result 182 states and 286 transitions. [2021-07-09 18:46:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:46:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:49,689 INFO L225 Difference]: With dead ends: 182 [2021-07-09 18:46:49,689 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:46:49,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:46:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:46:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-07-09 18:46:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 116 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 187 transitions. [2021-07-09 18:46:49,691 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 187 transitions. Word has length 23 [2021-07-09 18:46:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:49,691 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 187 transitions. [2021-07-09 18:46:49,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 187 transitions. [2021-07-09 18:46:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:49,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:49,691 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:49,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:49,892 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1752930477, now seen corresponding path program 67 times [2021-07-09 18:46:49,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:49,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799442228] [2021-07-09 18:46:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:50,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799442228] [2021-07-09 18:46:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799442228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582007370] [2021-07-09 18:46:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582007370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:46:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389030945] [2021-07-09 18:46:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:46:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:46:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:46:50,243 INFO L87 Difference]: Start difference. First operand 117 states and 187 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:50,776 INFO L93 Difference]: Finished difference Result 147 states and 230 transitions. [2021-07-09 18:46:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:46:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:50,776 INFO L225 Difference]: With dead ends: 147 [2021-07-09 18:46:50,776 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 18:46:50,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 18:46:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-07-09 18:46:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2021-07-09 18:46:50,778 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 23 [2021-07-09 18:46:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:50,778 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2021-07-09 18:46:50,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2021-07-09 18:46:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:50,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:50,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:51,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 18:46:51,002 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:51,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1920453071, now seen corresponding path program 68 times [2021-07-09 18:46:51,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:51,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089467503] [2021-07-09 18:46:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:51,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089467503] [2021-07-09 18:46:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089467503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710938118] [2021-07-09 18:46:51,129 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 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 [2021-07-09 18:46:51,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:46:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710938118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:51,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:51,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:46:51,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031686018] [2021-07-09 18:46:51,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:46:51,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:46:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:46:51,404 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:51,770 INFO L93 Difference]: Finished difference Result 117 states and 172 transitions. [2021-07-09 18:46:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:46:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:51,770 INFO L225 Difference]: With dead ends: 117 [2021-07-09 18:46:51,770 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 18:46:51,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:46:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 18:46:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-07-09 18:46:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 84 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 125 transitions. [2021-07-09 18:46:51,772 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 125 transitions. Word has length 23 [2021-07-09 18:46:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:51,772 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 125 transitions. [2021-07-09 18:46:51,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 125 transitions. [2021-07-09 18:46:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:51,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:51,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:51,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 18:46:51,973 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash 827116973, now seen corresponding path program 69 times [2021-07-09 18:46:51,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:51,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482957811] [2021-07-09 18:46:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482957811] [2021-07-09 18:46:52,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482957811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893902228] [2021-07-09 18:46:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:52,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:52,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893902228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:52,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:52,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 18:46:52,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777629744] [2021-07-09 18:46:52,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:46:52,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:46:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:52,289 INFO L87 Difference]: Start difference. First operand 85 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:52,667 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-07-09 18:46:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:46:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:52,667 INFO L225 Difference]: With dead ends: 111 [2021-07-09 18:46:52,667 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 18:46:52,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:46:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 18:46:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-07-09 18:46:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2021-07-09 18:46:52,669 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 23 [2021-07-09 18:46:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:52,669 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2021-07-09 18:46:52,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2021-07-09 18:46:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:52,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:52,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:52,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:46:52,885 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1790978285, now seen corresponding path program 70 times [2021-07-09 18:46:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528690487] [2021-07-09 18:46:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:52,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528690487] [2021-07-09 18:46:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528690487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:52,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42952757] [2021-07-09 18:46:52,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:53,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:53,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:46:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42952757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:53,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:53,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:46:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813575157] [2021-07-09 18:46:53,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:46:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:46:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:53,204 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:53,796 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-07-09 18:46:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:46:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:53,797 INFO L225 Difference]: With dead ends: 130 [2021-07-09 18:46:53,797 INFO L226 Difference]: Without dead ends: 109 [2021-07-09 18:46:53,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:46:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-09 18:46:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-07-09 18:46:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-07-09 18:46:53,798 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 23 [2021-07-09 18:46:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:53,798 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-07-09 18:46:53,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-07-09 18:46:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:46:53,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:53,799 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:54,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:54,013 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -266912117, now seen corresponding path program 71 times [2021-07-09 18:46:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298027964] [2021-07-09 18:46:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:54,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:54,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298027964] [2021-07-09 18:46:54,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298027964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:54,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389619646] [2021-07-09 18:46:54,125 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 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 [2021-07-09 18:46:54,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:46:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389619646] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2021-07-09 18:46:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230331308] [2021-07-09 18:46:54,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:46:54,306 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:54,384 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-07-09 18:46:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:46:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:46:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:54,385 INFO L225 Difference]: With dead ends: 88 [2021-07-09 18:46:54,385 INFO L226 Difference]: Without dead ends: 40 [2021-07-09 18:46:54,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-09 18:46:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-07-09 18:46:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-07-09 18:46:54,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 23 [2021-07-09 18:46:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:54,386 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-07-09 18:46:54,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-07-09 18:46:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:46:54,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:54,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:54,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:46:54,587 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash 516021093, now seen corresponding path program 72 times [2021-07-09 18:46:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:54,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83191390] [2021-07-09 18:46:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:54,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83191390] [2021-07-09 18:46:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83191390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800930555] [2021-07-09 18:46:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:54,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:46:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:46:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:46:54,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800930555] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:46:54,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:46:54,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2021-07-09 18:46:54,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531736345] [2021-07-09 18:46:54,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:54,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:54,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:54,951 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:54,982 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-07-09 18:46:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:46:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:46:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:54,982 INFO L225 Difference]: With dead ends: 38 [2021-07-09 18:46:54,982 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 18:46:54,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:46:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 18:46:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 18:46:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 18:46:54,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-07-09 18:46:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:54,983 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 18:46:54,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 18:46:54,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 18:46:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:46:55,191 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:46:55,193 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:46:55 BasicIcfg [2021-07-09 18:46:55,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:46:55,194 INFO L168 Benchmark]: Toolchain (without parser) took 68997.96 ms. Allocated memory was 185.6 MB in the beginning and 348.1 MB in the end (delta: 162.5 MB). Free memory was 166.7 MB in the beginning and 315.6 MB in the end (delta: -148.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:46:55,194 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.38 ms. Allocated memory is still 185.6 MB. Free memory is still 167.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:46:55,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.25 ms. Allocated memory is still 185.6 MB. Free memory was 166.7 MB in the beginning and 165.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:46:55,194 INFO L168 Benchmark]: Boogie Preprocessor took 14.87 ms. Allocated memory is still 185.6 MB. Free memory was 165.2 MB in the beginning and 164.4 MB in the end (delta: 807.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:46:55,194 INFO L168 Benchmark]: RCFGBuilder took 250.21 ms. Allocated memory is still 185.6 MB. Free memory was 164.2 MB in the beginning and 154.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:46:55,194 INFO L168 Benchmark]: TraceAbstraction took 68698.55 ms. Allocated memory was 185.6 MB in the beginning and 348.1 MB in the end (delta: 162.5 MB). Free memory was 153.9 MB in the beginning and 315.6 MB in the end (delta: -161.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:46:55,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.38 ms. Allocated memory is still 185.6 MB. Free memory is still 167.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.25 ms. Allocated memory is still 185.6 MB. Free memory was 166.7 MB in the beginning and 165.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.87 ms. Allocated memory is still 185.6 MB. Free memory was 165.2 MB in the beginning and 164.4 MB in the end (delta: 807.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 250.21 ms. Allocated memory is still 185.6 MB. Free memory was 164.2 MB in the beginning and 154.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68698.55 ms. Allocated memory was 185.6 MB in the beginning and 348.1 MB in the end (delta: 162.5 MB). Free memory was 153.9 MB in the beginning and 315.6 MB in the end (delta: -161.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 68559.9ms, OverallIterations: 104, TraceHistogramMax: 3, EmptinessCheckTime: 63.9ms, AutomataDifference: 27867.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2410 SDtfs, 4794 SDslu, 12301 SDs, 0 SdLazy, 26863 SolverSat, 1691 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11115.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3278 GetRequests, 837 SyntacticMatches, 142 SemanticMatches, 2299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 29247.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=533occurred in iteration=78, InterpolantAutomatonStates: 1578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 453.6ms AutomataMinimizationTime, 104 MinimizatonAttempts, 4705 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 174.9ms SsaConstructionTime, 604.5ms SatisfiabilityAnalysisTime, 21758.6ms InterpolantComputationTime, 3387 NumberOfCodeBlocks, 3387 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3208 ConstructedInterpolants, 0 QuantifiedInterpolants, 26694 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2838 ConjunctsInSsa, 1021 ConjunctsInUnsatCore, 179 InterpolantComputations, 39 PerfectInterpolantSequences, 107/455 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...