/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 10:35:21,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 10:35:21,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 10:35:21,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 10:35:21,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 10:35:21,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 10:35:21,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 10:35:21,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 10:35:21,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 10:35:21,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 10:35:21,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 10:35:21,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 10:35:21,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 10:35:21,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 10:35:21,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 10:35:21,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 10:35:21,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 10:35:21,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 10:35:21,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 10:35:21,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 10:35:21,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 10:35:21,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 10:35:21,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 10:35:21,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 10:35:21,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 10:35:21,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 10:35:21,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 10:35:21,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 10:35:21,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 10:35:21,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 10:35:21,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 10:35:21,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 10:35:21,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 10:35:21,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 10:35:21,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 10:35:21,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 10:35:21,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 10:35:21,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 10:35:21,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 10:35:21,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 10:35:21,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 10:35:21,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 10:35:21,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 10:35:21,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 10:35:21,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 10:35:21,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 10:35:21,875 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 10:35:21,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 10:35:21,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 10:35:21,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 10:35:21,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 10:35:21,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 10:35:21,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 10:35:21,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 10:35:21,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 10:35:21,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 10:35:21,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 10:35:21,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 10:35:21,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 10:35:21,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 10:35:21,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 10:35:21,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 10:35:21,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 10:35:21,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 10:35:21,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 10:35:21,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 10:35:21,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 10:35:22,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 10:35:22,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 10:35:22,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 10:35:22,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 10:35:22,195 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 10:35:22,196 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-09 10:35:22,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/884f8f5a6/d6d506fc2cd740278bfa89dda0bc6948/FLAG65f6c7a42 [2020-10-09 10:35:22,762 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 10:35:22,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-09 10:35:22,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/884f8f5a6/d6d506fc2cd740278bfa89dda0bc6948/FLAG65f6c7a42 [2020-10-09 10:35:23,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/884f8f5a6/d6d506fc2cd740278bfa89dda0bc6948 [2020-10-09 10:35:23,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 10:35:23,089 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 10:35:23,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:23,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 10:35:23,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 10:35:23,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d14d59a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23, skipping insertion in model container [2020-10-09 10:35:23,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 10:35:23,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 10:35:23,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:23,666 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 10:35:23,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:23,819 INFO L208 MainTranslator]: Completed translation [2020-10-09 10:35:23,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23 WrapperNode [2020-10-09 10:35:23,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:23,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:23,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 10:35:23,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 10:35:23,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:23,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 10:35:23,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 10:35:23,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 10:35:23,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... [2020-10-09 10:35:23,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 10:35:23,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 10:35:23,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 10:35:23,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 10:35:23,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 10:35:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 10:35:24,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 10:35:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 10:35:24,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 10:35:24,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 10:35:24,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 10:35:24,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 10:35:24,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 10:35:24,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 10:35:24,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 10:35:24,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 10:35:24,008 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 10:35:24,415 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 10:35:24,415 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 10:35:24,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:24 BoogieIcfgContainer [2020-10-09 10:35:24,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 10:35:24,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 10:35:24,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 10:35:24,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 10:35:24,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 10:35:23" (1/3) ... [2020-10-09 10:35:24,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69dbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:24, skipping insertion in model container [2020-10-09 10:35:24,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:23" (2/3) ... [2020-10-09 10:35:24,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69dbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:24, skipping insertion in model container [2020-10-09 10:35:24,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:24" (3/3) ... [2020-10-09 10:35:24,426 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-09 10:35:24,438 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 10:35:24,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 10:35:24,447 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 10:35:24,448 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 10:35:24,472 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,473 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,473 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,473 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,474 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,474 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,474 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,475 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,475 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,475 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,476 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,477 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,477 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,477 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,478 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,478 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,478 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,478 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,479 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,479 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,479 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,480 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,480 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,480 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,480 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,481 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,485 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,485 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,485 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,485 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,486 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,486 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,494 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,494 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:24,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 10:35:24,531 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 10:35:24,531 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 10:35:24,532 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 10:35:24,532 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 10:35:24,532 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 10:35:24,532 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 10:35:24,532 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 10:35:24,532 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 10:35:24,546 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 10:35:24,549 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,552 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:24,593 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 10:35:24,594 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 10:35:24,600 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-09 10:35:24,603 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-09 10:35:25,582 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-09 10:35:25,823 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-09 10:35:25,910 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-09 10:35:25,910 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-09 10:35:25,917 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-09 10:35:25,929 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-09 10:35:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-09 10:35:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-09 10:35:25,938 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:25,939 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-09 10:35:25,940 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-09 10:35:25,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:25,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153947267] [2020-10-09 10:35:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153947267] [2020-10-09 10:35:26,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 10:35:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787996399] [2020-10-09 10:35:26,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 10:35:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 10:35:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 10:35:26,189 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-09 10:35:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,254 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-09 10:35:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:26,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-09 10:35:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,268 INFO L225 Difference]: With dead ends: 83 [2020-10-09 10:35:26,269 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 10:35:26,270 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 10:35:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-09 10:35:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 10:35:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-09 10:35:26,313 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-09 10:35:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,314 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-09 10:35:26,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 10:35:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-09 10:35:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,315 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 10:35:26,316 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-09 10:35:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683338250] [2020-10-09 10:35:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683338250] [2020-10-09 10:35:26,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506407393] [2020-10-09 10:35:26,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,464 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-09 10:35:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,517 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-09 10:35:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:26,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,519 INFO L225 Difference]: With dead ends: 80 [2020-10-09 10:35:26,519 INFO L226 Difference]: Without dead ends: 75 [2020-10-09 10:35:26,520 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-09 10:35:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-09 10:35:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 10:35:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-09 10:35:26,531 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-09 10:35:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,532 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-09 10:35:26,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-09 10:35:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,534 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,534 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 10:35:26,534 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-09 10:35:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445130106] [2020-10-09 10:35:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445130106] [2020-10-09 10:35:26,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400441566] [2020-10-09 10:35:26,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,615 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-09 10:35:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,652 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-09 10:35:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:26,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,656 INFO L225 Difference]: With dead ends: 73 [2020-10-09 10:35:26,656 INFO L226 Difference]: Without dead ends: 70 [2020-10-09 10:35:26,657 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-09 10:35:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-09 10:35:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 10:35:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-09 10:35:26,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-09 10:35:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,677 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-09 10:35:26,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-09 10:35:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:26,679 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,679 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-09 10:35:26,680 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-09 10:35:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116808083] [2020-10-09 10:35:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116808083] [2020-10-09 10:35:26,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:26,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515536251] [2020-10-09 10:35:26,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:26,772 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-09 10:35:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:26,834 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-09 10:35:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:26,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:26,836 INFO L225 Difference]: With dead ends: 86 [2020-10-09 10:35:26,837 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 10:35:26,837 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 10:35:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-09 10:35:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 10:35:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-09 10:35:26,847 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-09 10:35:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:26,847 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-09 10:35:26,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-09 10:35:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:26,849 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:26,849 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:26,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-09 10:35:26,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-09 10:35:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:26,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072221653] [2020-10-09 10:35:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:26,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072221653] [2020-10-09 10:35:26,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834468288] [2020-10-09 10:35:26,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:27,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:27,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-09 10:35:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179524971] [2020-10-09 10:35:27,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 10:35:27,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:27,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 10:35:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:27,127 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-09 10:35:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:27,196 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-09 10:35:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:27,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-09 10:35:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:27,198 INFO L225 Difference]: With dead ends: 101 [2020-10-09 10:35:27,198 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 10:35:27,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 10:35:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-09 10:35:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 10:35:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-09 10:35:27,207 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-09 10:35:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:27,208 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-09 10:35:27,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 10:35:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-09 10:35:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:27,209 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:27,209 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:27,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,423 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-09 10:35:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:27,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985317922] [2020-10-09 10:35:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985317922] [2020-10-09 10:35:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063105795] [2020-10-09 10:35:27,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:27,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:27,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:27,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915243173] [2020-10-09 10:35:27,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:27,608 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-09 10:35:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:27,639 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-09 10:35:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:27,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:27,640 INFO L225 Difference]: With dead ends: 84 [2020-10-09 10:35:27,640 INFO L226 Difference]: Without dead ends: 81 [2020-10-09 10:35:27,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-09 10:35:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-09 10:35:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 10:35:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-09 10:35:27,648 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-09 10:35:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:27,648 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-09 10:35:27,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-09 10:35:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:27,649 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:27,650 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:27,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,864 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-09 10:35:27,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:27,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393301260] [2020-10-09 10:35:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393301260] [2020-10-09 10:35:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115304435] [2020-10-09 10:35:27,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:27,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:28,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:28,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481073784] [2020-10-09 10:35:28,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:28,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:28,077 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-09 10:35:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,127 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-09 10:35:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:28,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,129 INFO L225 Difference]: With dead ends: 90 [2020-10-09 10:35:28,129 INFO L226 Difference]: Without dead ends: 87 [2020-10-09 10:35:28,130 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-09 10:35:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-09 10:35:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 10:35:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-09 10:35:28,137 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-09 10:35:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,137 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-09 10:35:28,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-09 10:35:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:28,139 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,139 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:28,353 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-09 10:35:28,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865625651] [2020-10-09 10:35:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865625651] [2020-10-09 10:35:28,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490889745] [2020-10-09 10:35:28,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:28,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:28,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:28,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:28,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447872219] [2020-10-09 10:35:28,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:28,528 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-09 10:35:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,623 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-09 10:35:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:28,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,625 INFO L225 Difference]: With dead ends: 99 [2020-10-09 10:35:28,625 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 10:35:28,625 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 10:35:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-09 10:35:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 10:35:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-09 10:35:28,632 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-09 10:35:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,632 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-09 10:35:28,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-09 10:35:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:28,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,634 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:28,847 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-09 10:35:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924472371] [2020-10-09 10:35:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:28,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924472371] [2020-10-09 10:35:28,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:28,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034498025] [2020-10-09 10:35:28,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:28,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:28,921 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-09 10:35:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:28,955 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-09 10:35:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:28,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:28,957 INFO L225 Difference]: With dead ends: 92 [2020-10-09 10:35:28,957 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 10:35:28,958 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 10:35:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-09 10:35:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 10:35:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-09 10:35:28,964 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-09 10:35:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:28,965 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-09 10:35:28,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-09 10:35:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:28,966 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:28,966 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:28,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-09 10:35:28,967 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-09 10:35:28,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:28,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165382802] [2020-10-09 10:35:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165382802] [2020-10-09 10:35:29,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:29,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:29,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564175698] [2020-10-09 10:35:29,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:29,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:29,058 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-09 10:35:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,111 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-09 10:35:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:29,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,113 INFO L225 Difference]: With dead ends: 100 [2020-10-09 10:35:29,113 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 10:35:29,114 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 10:35:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-09 10:35:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 10:35:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-09 10:35:29,129 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-09 10:35:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,129 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-09 10:35:29,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-09 10:35:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,134 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-09 10:35:29,135 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-09 10:35:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218920577] [2020-10-09 10:35:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218920577] [2020-10-09 10:35:29,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:29,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:29,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088763485] [2020-10-09 10:35:29,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:29,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:29,232 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-09 10:35:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,323 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:29,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,325 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:29,325 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:29,325 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-09 10:35:29,333 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-09 10:35:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,334 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-09 10:35:29,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-09 10:35:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,336 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,336 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-09 10:35:29,336 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-09 10:35:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900360850] [2020-10-09 10:35:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900360850] [2020-10-09 10:35:29,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:29,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:29,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523694394] [2020-10-09 10:35:29,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:29,402 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-09 10:35:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,477 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:29,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,479 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:29,479 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:29,480 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-09 10:35:29,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-09 10:35:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,488 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-09 10:35:29,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-09 10:35:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,489 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:29,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-09 10:35:29,489 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:29,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-09 10:35:29,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:29,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748208925] [2020-10-09 10:35:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748208925] [2020-10-09 10:35:29,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943984819] [2020-10-09 10:35:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:29,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:29,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:29,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:29,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-09 10:35:29,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530867367] [2020-10-09 10:35:29,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 10:35:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 10:35:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:29,739 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-09 10:35:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:29,833 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-09 10:35:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:29,834 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-09 10:35:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:29,835 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:29,835 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:29,835 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-09 10:35:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 10:35:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-09 10:35:29,840 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-09 10:35:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-09 10:35:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 10:35:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-09 10:35:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:29,841 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:29,841 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:30,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-09 10:35:30,053 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-09 10:35:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:30,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272334861] [2020-10-09 10:35:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272334861] [2020-10-09 10:35:30,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499857050] [2020-10-09 10:35:30,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:30,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:30,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:30,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:30,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:30,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102125475] [2020-10-09 10:35:30,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:30,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:30,280 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-09 10:35:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:30,319 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-09 10:35:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:30,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:30,321 INFO L225 Difference]: With dead ends: 108 [2020-10-09 10:35:30,321 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 10:35:30,321 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 10:35:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-09 10:35:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 10:35:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-09 10:35:30,326 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-09 10:35:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-09 10:35:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-09 10:35:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:30,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:30,327 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:30,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:30,538 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-09 10:35:30,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:30,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988343209] [2020-10-09 10:35:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988343209] [2020-10-09 10:35:30,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971760246] [2020-10-09 10:35:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:30,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:30,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:30,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397038031] [2020-10-09 10:35:30,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:30,735 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-09 10:35:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:30,788 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-09 10:35:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:30,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:30,793 INFO L225 Difference]: With dead ends: 116 [2020-10-09 10:35:30,793 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 10:35:30,793 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 10:35:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-09 10:35:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 10:35:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-09 10:35:30,798 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-09 10:35:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:30,798 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-09 10:35:30,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-09 10:35:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:30,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:30,799 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:31,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 10:35:31,011 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-09 10:35:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760593620] [2020-10-09 10:35:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760593620] [2020-10-09 10:35:31,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236599656] [2020-10-09 10:35:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:31,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:31,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:31,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:31,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772359963] [2020-10-09 10:35:31,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:31,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:31,267 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-09 10:35:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:31,366 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-09 10:35:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:31,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:31,368 INFO L225 Difference]: With dead ends: 115 [2020-10-09 10:35:31,368 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 10:35:31,369 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 10:35:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-09 10:35:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-09 10:35:31,376 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-09 10:35:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-09 10:35:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-09 10:35:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:31,378 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:31,378 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:31,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-09 10:35:31,593 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-09 10:35:31,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:31,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124136927] [2020-10-09 10:35:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124136927] [2020-10-09 10:35:31,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554126744] [2020-10-09 10:35:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:31,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:31,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:31,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:31,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:31,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40017915] [2020-10-09 10:35:31,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:31,794 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-09 10:35:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:31,915 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-09 10:35:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:31,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:31,917 INFO L225 Difference]: With dead ends: 124 [2020-10-09 10:35:31,917 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 10:35:31,918 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 10:35:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-09 10:35:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-09 10:35:31,921 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-09 10:35:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:31,922 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-09 10:35:31,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-09 10:35:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:31,923 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:31,923 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:32,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-09 10:35:32,134 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-09 10:35:32,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:32,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378941868] [2020-10-09 10:35:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378941868] [2020-10-09 10:35:32,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839536938] [2020-10-09 10:35:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:32,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:32,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:32,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:32,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558335413] [2020-10-09 10:35:32,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:32,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:32,335 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-09 10:35:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:32,384 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-09 10:35:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:32,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:32,387 INFO L225 Difference]: With dead ends: 113 [2020-10-09 10:35:32,387 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 10:35:32,388 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 10:35:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-09 10:35:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 10:35:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-09 10:35:32,392 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-09 10:35:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:32,392 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-09 10:35:32,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-09 10:35:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:32,393 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:32,393 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:32,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-09 10:35:32,604 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-09 10:35:32,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:32,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973343145] [2020-10-09 10:35:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973343145] [2020-10-09 10:35:32,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400857136] [2020-10-09 10:35:32,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:32,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:32,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:32,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:32,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008586596] [2020-10-09 10:35:32,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:32,782 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-09 10:35:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:32,845 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-09 10:35:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:32,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:32,847 INFO L225 Difference]: With dead ends: 118 [2020-10-09 10:35:32,847 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 10:35:32,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 10:35:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-09 10:35:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 10:35:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-09 10:35:32,851 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-09 10:35:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:32,852 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-09 10:35:32,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-09 10:35:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:32,852 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:32,852 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:33,061 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-09 10:35:33,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632357067] [2020-10-09 10:35:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632357067] [2020-10-09 10:35:33,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113111440] [2020-10-09 10:35:33,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:33,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327402945] [2020-10-09 10:35:33,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:33,269 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-09 10:35:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,332 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-09 10:35:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:33,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,334 INFO L225 Difference]: With dead ends: 119 [2020-10-09 10:35:33,334 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:33,334 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-09 10:35:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-09 10:35:33,338 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-09 10:35:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-09 10:35:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-09 10:35:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:33,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,339 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:33,550 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-09 10:35:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710392983] [2020-10-09 10:35:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710392983] [2020-10-09 10:35:33,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279192922] [2020-10-09 10:35:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:33,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:33,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331126570] [2020-10-09 10:35:33,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:33,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:33,752 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-09 10:35:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,815 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-09 10:35:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:33,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,817 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:33,817 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 10:35:33,817 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 10:35:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-09 10:35:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 10:35:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-09 10:35:33,821 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-09 10:35:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,822 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-09 10:35:33,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-09 10:35:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:33,822 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,823 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-09 10:35:34,033 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-09 10:35:34,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459697716] [2020-10-09 10:35:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459697716] [2020-10-09 10:35:34,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747450558] [2020-10-09 10:35:34,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:34,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522063632] [2020-10-09 10:35:34,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:34,217 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,299 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-09 10:35:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:34,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,301 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:34,301 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:34,301 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-09 10:35:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-09 10:35:34,306 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-09 10:35:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,306 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-09 10:35:34,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-09 10:35:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:34,307 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,307 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,518 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-09 10:35:34,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088393863] [2020-10-09 10:35:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088393863] [2020-10-09 10:35:34,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323490036] [2020-10-09 10:35:34,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:34,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:34,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204160] [2020-10-09 10:35:34,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:34,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:34,724 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-09 10:35:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,804 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-09 10:35:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:34,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,805 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:34,805 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:34,806 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-09 10:35:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-09 10:35:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-09 10:35:34,810 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-09 10:35:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,810 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-09 10:35:34,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-09 10:35:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:34,813 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,813 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-09 10:35:35,022 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-09 10:35:35,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024289693] [2020-10-09 10:35:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024289693] [2020-10-09 10:35:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353973283] [2020-10-09 10:35:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:35,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135213574] [2020-10-09 10:35:35,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:35,277 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-09 10:35:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:35,463 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-09 10:35:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:35,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:35,465 INFO L225 Difference]: With dead ends: 133 [2020-10-09 10:35:35,465 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:35,465 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-09 10:35:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-09 10:35:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-09 10:35:35,469 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-09 10:35:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:35,470 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-09 10:35:35,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-09 10:35:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:35,471 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:35,471 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,672 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-09 10:35:35,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649687442] [2020-10-09 10:35:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649687442] [2020-10-09 10:35:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273479292] [2020-10-09 10:35:35,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390948354] [2020-10-09 10:35:35,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:35,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:35,880 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:35,996 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-09 10:35:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:35,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:35,998 INFO L225 Difference]: With dead ends: 127 [2020-10-09 10:35:35,998 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 10:35:35,999 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 10:35:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-09 10:35:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:36,003 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,004 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:36,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:36,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,005 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-09 10:35:36,214 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-09 10:35:36,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725337838] [2020-10-09 10:35:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725337838] [2020-10-09 10:35:36,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077570190] [2020-10-09 10:35:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:36,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:36,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:36,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778478397] [2020-10-09 10:35:36,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:36,398 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,589 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-09 10:35:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:36,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,591 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:36,591 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:36,592 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-09 10:35:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:36,596 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,596 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:36,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:36,597 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,597 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-09 10:35:36,807 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-09 10:35:36,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872759944] [2020-10-09 10:35:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872759944] [2020-10-09 10:35:36,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686666058] [2020-10-09 10:35:36,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:36,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:36,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:36,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:36,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363372567] [2020-10-09 10:35:36,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:36,989 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,153 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-09 10:35:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:37,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,155 INFO L225 Difference]: With dead ends: 136 [2020-10-09 10:35:37,155 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 10:35:37,155 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 10:35:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-09 10:35:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-09 10:35:37,159 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-09 10:35:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,159 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-09 10:35:37,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-09 10:35:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:37,160 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,160 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-09 10:35:37,371 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-09 10:35:37,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125193654] [2020-10-09 10:35:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125193654] [2020-10-09 10:35:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597206773] [2020-10-09 10:35:37,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:37,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:37,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:37,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125513335] [2020-10-09 10:35:37,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:37,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,531 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-09 10:35:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,617 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-09 10:35:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:37,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,621 INFO L225 Difference]: With dead ends: 130 [2020-10-09 10:35:37,621 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:37,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-09 10:35:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:37,625 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,625 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:37,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:37,626 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,626 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-09 10:35:37,835 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-09 10:35:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130374098] [2020-10-09 10:35:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130374098] [2020-10-09 10:35:37,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859016585] [2020-10-09 10:35:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:37,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:37,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:38,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541178975] [2020-10-09 10:35:38,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:38,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:38,006 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:38,131 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-09 10:35:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:38,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:38,132 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:38,132 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:38,133 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-09 10:35:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:38,138 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:38,138 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:38,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:38,140 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:38,141 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-09 10:35:38,341 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-09 10:35:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211417257] [2020-10-09 10:35:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211417257] [2020-10-09 10:35:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907206679] [2020-10-09 10:35:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:38,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287031179] [2020-10-09 10:35:38,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:38,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:38,489 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:38,612 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-09 10:35:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:38,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:38,614 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:38,614 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 10:35:38,615 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 10:35:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-09 10:35:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:38,619 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:38,619 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:38,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:38,620 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:38,620 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,831 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-09 10:35:38,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221056213] [2020-10-09 10:35:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221056213] [2020-10-09 10:35:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864849565] [2020-10-09 10:35:38,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:39,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677767986] [2020-10-09 10:35:39,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:39,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:39,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,005 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,202 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-09 10:35:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:39,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,204 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:39,204 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:39,205 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-09 10:35:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:39,209 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,209 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:39,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,210 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,210 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:39,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-09 10:35:39,420 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-09 10:35:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:39,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808285670] [2020-10-09 10:35:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808285670] [2020-10-09 10:35:39,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453587345] [2020-10-09 10:35:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:39,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:39,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959578988] [2020-10-09 10:35:39,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,604 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,782 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-09 10:35:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:39,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,783 INFO L225 Difference]: With dead ends: 135 [2020-10-09 10:35:39,783 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 10:35:39,784 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 10:35:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-09 10:35:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-09 10:35:39,788 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-09 10:35:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,788 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-09 10:35:39,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-09 10:35:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,789 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,789 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,000 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-09 10:35:40,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123867796] [2020-10-09 10:35:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123867796] [2020-10-09 10:35:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180309114] [2020-10-09 10:35:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-09 10:35:40,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181738938] [2020-10-09 10:35:40,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 10:35:40,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 10:35:40,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:40,218 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-09 10:35:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,348 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-09 10:35:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:40,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-09 10:35:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,350 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:40,350 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:40,351 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-09 10:35:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 10:35:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-09 10:35:40,358 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-09 10:35:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,358 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-09 10:35:40,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 10:35:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-09 10:35:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,359 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,359 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-09 10:35:40,570 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-09 10:35:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113741355] [2020-10-09 10:35:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113741355] [2020-10-09 10:35:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377404508] [2020-10-09 10:35:40,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:40,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023083503] [2020-10-09 10:35:40,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:40,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:40,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:40,793 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-09 10:35:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,831 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-09 10:35:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:40,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,833 INFO L225 Difference]: With dead ends: 132 [2020-10-09 10:35:40,833 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:40,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-09 10:35:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:40,838 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,838 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:40,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,839 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,839 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:41,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-09 10:35:41,051 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-09 10:35:41,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:41,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550074160] [2020-10-09 10:35:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550074160] [2020-10-09 10:35:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129590038] [2020-10-09 10:35:41,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:41,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:41,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861125480] [2020-10-09 10:35:41,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:41,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:41,258 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,324 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-09 10:35:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:41,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,325 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:41,325 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:41,326 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-09 10:35:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:41,329 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,329 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:41,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,332 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,332 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:41,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-09 10:35:41,541 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-09 10:35:41,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:41,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955618682] [2020-10-09 10:35:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955618682] [2020-10-09 10:35:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916312715] [2020-10-09 10:35:41,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:41,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:35:41,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:41,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491141742] [2020-10-09 10:35:41,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:41,753 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,828 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-09 10:35:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:41,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,830 INFO L225 Difference]: With dead ends: 142 [2020-10-09 10:35:41,830 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 10:35:41,831 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 10:35:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-09 10:35:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-09 10:35:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-09 10:35:41,835 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-09 10:35:41,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,836 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-09 10:35:41,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-09 10:35:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,836 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,836 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-09 10:35:42,044 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-09 10:35:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145467388] [2020-10-09 10:35:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145467388] [2020-10-09 10:35:42,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057706443] [2020-10-09 10:35:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675643130] [2020-10-09 10:35:42,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:42,250 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-09 10:35:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:42,338 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-09 10:35:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:42,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:42,340 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:42,340 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:42,341 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-09 10:35:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:35:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-09 10:35:42,346 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-09 10:35:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:42,346 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-09 10:35:42,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-09 10:35:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:42,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:42,347 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-09 10:35:42,559 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-09 10:35:42,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747250621] [2020-10-09 10:35:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747250621] [2020-10-09 10:35:42,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647077899] [2020-10-09 10:35:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:42,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051563532] [2020-10-09 10:35:42,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:42,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:42,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:42,746 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:42,893 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:42,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:42,896 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:42,896 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 10:35:42,897 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 10:35:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-09 10:35:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-09 10:35:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-09 10:35:42,900 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-09 10:35:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:42,900 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-09 10:35:42,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-09 10:35:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:42,901 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:42,901 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:43,102 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-09 10:35:43,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855065246] [2020-10-09 10:35:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855065246] [2020-10-09 10:35:43,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552097901] [2020-10-09 10:35:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:43,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:43,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535154160] [2020-10-09 10:35:43,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:43,301 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:43,352 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-09 10:35:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:43,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:43,354 INFO L225 Difference]: With dead ends: 138 [2020-10-09 10:35:43,354 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:43,354 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-09 10:35:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-09 10:35:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-09 10:35:43,359 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-09 10:35:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:43,359 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-09 10:35:43,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-09 10:35:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:43,360 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:43,360 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-09 10:35:43,570 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-09 10:35:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975469528] [2020-10-09 10:35:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975469528] [2020-10-09 10:35:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136104641] [2020-10-09 10:35:43,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:43,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:43,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:43,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:43,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074896281] [2020-10-09 10:35:43,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:43,796 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:43,904 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-09 10:35:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:43,905 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:43,906 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:43,906 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 10:35:43,907 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 10:35:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-09 10:35:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-09 10:35:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-09 10:35:43,912 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-09 10:35:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:43,912 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-09 10:35:43,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-09 10:35:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:43,912 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:43,912 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-09 10:35:44,113 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-09 10:35:44,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828553550] [2020-10-09 10:35:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828553550] [2020-10-09 10:35:44,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184414935] [2020-10-09 10:35:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:44,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:44,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664283932] [2020-10-09 10:35:44,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:44,305 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-09 10:35:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,426 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:44,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,428 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:44,428 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 10:35:44,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 10:35:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-09 10:35:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-09 10:35:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-09 10:35:44,433 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-09 10:35:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,433 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-09 10:35:44,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-09 10:35:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:44,434 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,434 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:44,644 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-09 10:35:44,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898127889] [2020-10-09 10:35:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898127889] [2020-10-09 10:35:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697724930] [2020-10-09 10:35:44,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:44,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495311686] [2020-10-09 10:35:44,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:44,851 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,954 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-09 10:35:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:44,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,956 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:44,956 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:44,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-09 10:35:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:44,959 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,960 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:44,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:44,961 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,961 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:45,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-09 10:35:45,170 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-09 10:35:45,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:45,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331017494] [2020-10-09 10:35:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331017494] [2020-10-09 10:35:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536869912] [2020-10-09 10:35:45,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:45,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:45,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434270103] [2020-10-09 10:35:45,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:45,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:45,384 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:45,510 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-09 10:35:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:45,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:45,512 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:45,512 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:45,512 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-09 10:35:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-09 10:35:45,516 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-09 10:35:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:45,516 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-09 10:35:45,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-09 10:35:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:45,517 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:45,517 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:45,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,726 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-09 10:35:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:45,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086708092] [2020-10-09 10:35:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086708092] [2020-10-09 10:35:45,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769481842] [2020-10-09 10:35:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701773389] [2020-10-09 10:35:45,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:45,951 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-09 10:35:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,006 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-09 10:35:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:46,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,008 INFO L225 Difference]: With dead ends: 152 [2020-10-09 10:35:46,008 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 10:35:46,009 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 10:35:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-09 10:35:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-09 10:35:46,013 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-09 10:35:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,013 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-09 10:35:46,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-09 10:35:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:46,014 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,014 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-09 10:35:46,225 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-09 10:35:46,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122451248] [2020-10-09 10:35:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122451248] [2020-10-09 10:35:46,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324364773] [2020-10-09 10:35:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:46,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:46,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:46,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439331316] [2020-10-09 10:35:46,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:46,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:46,448 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-09 10:35:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,587 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-09 10:35:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:46,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,590 INFO L225 Difference]: With dead ends: 153 [2020-10-09 10:35:46,590 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 10:35:46,590 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 10:35:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-09 10:35:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:46,595 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,595 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:46,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:46,596 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,596 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-09 10:35:46,808 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-09 10:35:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730380419] [2020-10-09 10:35:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730380419] [2020-10-09 10:35:46,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332338757] [2020-10-09 10:35:46,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:46,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:46,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:46,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:46,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910055788] [2020-10-09 10:35:46,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:46,999 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,154 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:47,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,156 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:47,156 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:47,157 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-09 10:35:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:35:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-09 10:35:47,165 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-09 10:35:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,165 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-09 10:35:47,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-09 10:35:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:47,166 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,166 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-09 10:35:47,379 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-09 10:35:47,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002083677] [2020-10-09 10:35:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002083677] [2020-10-09 10:35:47,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708622091] [2020-10-09 10:35:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:47,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:47,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:47,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265347298] [2020-10-09 10:35:47,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:47,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:47,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:47,590 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-09 10:35:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,691 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-09 10:35:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:47,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,693 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:47,693 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:47,694 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-09 10:35:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:35:47,698 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:35:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,699 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:35:47,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:35:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:47,699 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,699 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-09 10:35:47,911 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-09 10:35:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190010145] [2020-10-09 10:35:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190010145] [2020-10-09 10:35:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366929089] [2020-10-09 10:35:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:48,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:48,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:48,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421153477] [2020-10-09 10:35:48,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:48,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:48,127 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,285 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-09 10:35:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:48,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,287 INFO L225 Difference]: With dead ends: 157 [2020-10-09 10:35:48,287 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:35:48,287 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:35:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-09 10:35:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-09 10:35:48,291 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-09 10:35:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,291 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-09 10:35:48,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-09 10:35:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:48,292 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,292 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:48,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:48,498 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-09 10:35:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:48,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576169333] [2020-10-09 10:35:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576169333] [2020-10-09 10:35:48,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343141593] [2020-10-09 10:35:48,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:48,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 10:35:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680181807] [2020-10-09 10:35:48,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:48,639 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-09 10:35:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,723 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-09 10:35:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:48,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-09 10:35:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,725 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:48,725 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:48,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-09 10:35:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:48,729 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:48,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:48,730 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,730 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:48,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-09 10:35:48,931 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-09 10:35:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:48,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936154055] [2020-10-09 10:35:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936154055] [2020-10-09 10:35:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127113784] [2020-10-09 10:35:48,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886633559] [2020-10-09 10:35:49,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,167 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:49,409 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-09 10:35:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:49,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:49,411 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:35:49,412 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:35:49,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:35:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:35:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:35:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-09 10:35:49,416 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-09 10:35:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:49,416 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-09 10:35:49,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-09 10:35:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:49,417 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:49,417 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:49,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-09 10:35:49,621 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-09 10:35:49,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:49,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878651335] [2020-10-09 10:35:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878651335] [2020-10-09 10:35:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532237706] [2020-10-09 10:35:49,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:49,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437340533] [2020-10-09 10:35:49,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,833 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,014 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:50,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,017 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:50,017 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:50,017 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-09 10:35:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:50,020 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,020 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:50,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,021 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,021 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:50,222 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-09 10:35:50,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:50,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610017374] [2020-10-09 10:35:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610017374] [2020-10-09 10:35:50,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408667636] [2020-10-09 10:35:50,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:50,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:50,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:50,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:50,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622769749] [2020-10-09 10:35:50,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:50,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:50,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:50,535 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,987 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-09 10:35:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:50,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,989 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:35:50,990 INFO L226 Difference]: Without dead ends: 171 [2020-10-09 10:35:50,990 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:35:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-09 10:35:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-09 10:35:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:50,996 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,996 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:50,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,998 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,998 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-09 10:35:51,199 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-09 10:35:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749115227] [2020-10-09 10:35:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749115227] [2020-10-09 10:35:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288758542] [2020-10-09 10:35:51,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:51,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:51,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:51,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934510445] [2020-10-09 10:35:51,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:51,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:51,404 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:51,637 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-09 10:35:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:51,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:51,639 INFO L225 Difference]: With dead ends: 166 [2020-10-09 10:35:51,639 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:51,639 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:35:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-09 10:35:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-09 10:35:51,643 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-09 10:35:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:51,643 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-09 10:35:51,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-09 10:35:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:51,644 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:51,644 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,852 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-09 10:35:51,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578328202] [2020-10-09 10:35:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578328202] [2020-10-09 10:35:51,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082370444] [2020-10-09 10:35:51,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:51,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:52,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732366914] [2020-10-09 10:35:52,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:52,049 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,271 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-09 10:35:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:52,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,274 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:35:52,274 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:52,275 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-09 10:35:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-09 10:35:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-09 10:35:52,280 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-09 10:35:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,280 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-09 10:35:52,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-09 10:35:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,282 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,282 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:52,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-09 10:35:52,494 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-09 10:35:52,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:52,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822915287] [2020-10-09 10:35:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822915287] [2020-10-09 10:35:52,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757733300] [2020-10-09 10:35:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:52,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:52,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:52,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:52,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:52,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:52,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595898187] [2020-10-09 10:35:52,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:52,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:52,701 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,955 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-09 10:35:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:52,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,957 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:35:52,957 INFO L226 Difference]: Without dead ends: 168 [2020-10-09 10:35:52,957 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:35:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-09 10:35:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-09 10:35:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-09 10:35:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-09 10:35:52,961 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-09 10:35:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,961 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-09 10:35:52,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-09 10:35:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,962 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,962 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:53,172 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-09 10:35:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608706173] [2020-10-09 10:35:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608706173] [2020-10-09 10:35:53,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928719915] [2020-10-09 10:35:53,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:53,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:53,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222343506] [2020-10-09 10:35:53,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:53,376 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-09 10:35:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:53,671 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-09 10:35:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:35:53,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:53,673 INFO L225 Difference]: With dead ends: 177 [2020-10-09 10:35:53,673 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:35:53,674 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:35:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:35:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-09 10:35:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-09 10:35:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-09 10:35:53,678 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-09 10:35:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:53,679 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-09 10:35:53,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-09 10:35:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:53,679 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:53,680 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-09 10:35:53,894 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-09 10:35:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897672937] [2020-10-09 10:35:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897672937] [2020-10-09 10:35:53,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548812510] [2020-10-09 10:35:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:53,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:53,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:54,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:54,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916011578] [2020-10-09 10:35:54,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:54,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:54,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:54,071 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-09 10:35:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:54,430 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-09 10:35:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:35:54,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:54,432 INFO L225 Difference]: With dead ends: 190 [2020-10-09 10:35:54,432 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:35:54,433 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:35:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:35:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-09 10:35:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-09 10:35:54,439 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-09 10:35:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:54,439 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-09 10:35:54,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-09 10:35:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:54,441 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:54,441 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:54,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-09 10:35:54,653 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-09 10:35:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:54,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186829179] [2020-10-09 10:35:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186829179] [2020-10-09 10:35:54,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443271456] [2020-10-09 10:35:54,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:54,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:35:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:54,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:54,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:54,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496228866] [2020-10-09 10:35:54,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:54,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:54,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:54,832 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-09 10:35:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,184 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-09 10:35:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:35:55,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,186 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:35:55,186 INFO L226 Difference]: Without dead ends: 175 [2020-10-09 10:35:55,187 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:35:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-09 10:35:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-09 10:35:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-09 10:35:55,189 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-09 10:35:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,189 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-09 10:35:55,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-09 10:35:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,190 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-09 10:35:55,391 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-09 10:35:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329802743] [2020-10-09 10:35:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329802743] [2020-10-09 10:35:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757936460] [2020-10-09 10:35:55,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:55,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:55,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:55,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984947026] [2020-10-09 10:35:55,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:55,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:55,592 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-09 10:35:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,737 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-09 10:35:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:55,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,739 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:35:55,739 INFO L226 Difference]: Without dead ends: 162 [2020-10-09 10:35:55,739 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-09 10:35:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-09 10:35:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-09 10:35:55,743 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-09 10:35:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,743 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-09 10:35:55,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-09 10:35:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,743 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,743 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-09 10:35:55,944 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-09 10:35:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196282176] [2020-10-09 10:35:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196282176] [2020-10-09 10:35:56,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107067102] [2020-10-09 10:35:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:56,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147252141] [2020-10-09 10:35:56,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,143 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-09 10:35:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:56,289 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-09 10:35:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:56,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:56,291 INFO L225 Difference]: With dead ends: 161 [2020-10-09 10:35:56,291 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:35:56,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:35:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-09 10:35:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-09 10:35:56,294 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-09 10:35:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:56,294 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-09 10:35:56,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-09 10:35:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:56,294 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:56,295 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:56,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-09 10:35:56,503 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-09 10:35:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:56,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458682601] [2020-10-09 10:35:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458682601] [2020-10-09 10:35:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487433245] [2020-10-09 10:35:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:56,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:35:56,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:56,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245573003] [2020-10-09 10:35:56,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,690 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-09 10:35:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:56,877 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-09 10:35:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:56,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:56,879 INFO L225 Difference]: With dead ends: 165 [2020-10-09 10:35:56,879 INFO L226 Difference]: Without dead ends: 163 [2020-10-09 10:35:56,880 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-09 10:35:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-09 10:35:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-09 10:35:56,883 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-09 10:35:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:56,883 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-09 10:35:56,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-09 10:35:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:56,884 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:56,884 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:57,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-09 10:35:57,094 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-09 10:35:57,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:57,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402426376] [2020-10-09 10:35:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402426376] [2020-10-09 10:35:57,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001537375] [2020-10-09 10:35:57,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:57,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:57,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:57,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339303736] [2020-10-09 10:35:57,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:57,292 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-09 10:35:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:57,463 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-09 10:35:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:35:57,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:57,466 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:35:57,466 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:35:57,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:35:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-09 10:35:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:35:57,471 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:35:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:57,471 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:35:57,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:35:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:57,472 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:57,472 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:57,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,683 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:57,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-09 10:35:57,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:57,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050023629] [2020-10-09 10:35:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050023629] [2020-10-09 10:35:57,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701199932] [2020-10-09 10:35:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:57,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:57,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780709807] [2020-10-09 10:35:57,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:57,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:57,873 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:58,122 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-09 10:35:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:58,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:58,124 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:35:58,124 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:35:58,124 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:35:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:35:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-09 10:35:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:35:58,127 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:35:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:58,127 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:35:58,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:35:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:58,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:58,128 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,332 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-09 10:35:58,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680072930] [2020-10-09 10:35:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680072930] [2020-10-09 10:35:58,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993675611] [2020-10-09 10:35:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:58,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:58,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:58,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:58,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213192555] [2020-10-09 10:35:58,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:58,502 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:58,704 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-09 10:35:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:58,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:58,706 INFO L225 Difference]: With dead ends: 160 [2020-10-09 10:35:58,706 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:35:58,706 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:35:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:35:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-09 10:35:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:35:58,710 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:35:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:58,710 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:35:58,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:35:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:58,711 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:58,711 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,921 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-09 10:35:58,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500067977] [2020-10-09 10:35:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500067977] [2020-10-09 10:35:58,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363417578] [2020-10-09 10:35:58,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:59,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:59,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:59,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:59,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4354833] [2020-10-09 10:35:59,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:59,145 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:59,475 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-09 10:35:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:35:59,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:59,478 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:35:59,478 INFO L226 Difference]: Without dead ends: 181 [2020-10-09 10:35:59,478 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:35:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-09 10:35:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-09 10:35:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:35:59,481 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:35:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:59,481 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:35:59,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:35:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:59,482 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:59,482 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:59,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:59,684 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-09 10:35:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:59,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546396729] [2020-10-09 10:35:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546396729] [2020-10-09 10:35:59,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790021937] [2020-10-09 10:35:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:59,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:59,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969192340] [2020-10-09 10:35:59,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:59,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:59,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:59,858 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:36:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:00,092 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-09 10:36:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:36:00,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:00,094 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:36:00,094 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:36:00,094 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:36:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-09 10:36:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:36:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:36:00,098 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:36:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:00,098 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:36:00,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:36:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:00,098 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:00,098 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:00,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-09 10:36:00,299 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-09 10:36:00,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:00,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280723896] [2020-10-09 10:36:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280723896] [2020-10-09 10:36:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845022672] [2020-10-09 10:36:00,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:00,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:00,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:00,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118911046] [2020-10-09 10:36:00,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:00,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:00,478 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:36:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:00,808 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-09 10:36:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:00,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:00,810 INFO L225 Difference]: With dead ends: 192 [2020-10-09 10:36:00,810 INFO L226 Difference]: Without dead ends: 184 [2020-10-09 10:36:00,810 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:36:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-09 10:36:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-09 10:36:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:36:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-09 10:36:00,814 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-09 10:36:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:00,814 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-09 10:36:00,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-09 10:36:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:00,814 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:00,815 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:01,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:01,016 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-09 10:36:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:01,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843501298] [2020-10-09 10:36:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843501298] [2020-10-09 10:36:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563642210] [2020-10-09 10:36:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:01,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:01,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:01,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3088429] [2020-10-09 10:36:01,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:01,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:01,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:01,185 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-09 10:36:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:01,533 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-09 10:36:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:01,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:01,535 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:36:01,536 INFO L226 Difference]: Without dead ends: 175 [2020-10-09 10:36:01,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-09 10:36:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-09 10:36:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:36:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-09 10:36:01,540 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-09 10:36:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:01,540 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-09 10:36:01,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-09 10:36:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:01,541 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:01,541 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:01,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-09 10:36:01,743 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-09 10:36:01,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:01,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463979111] [2020-10-09 10:36:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463979111] [2020-10-09 10:36:01,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104540716] [2020-10-09 10:36:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:01,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:01,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:01,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:36:01,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465069939] [2020-10-09 10:36:01,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:36:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:36:01,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:01,981 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-09 10:36:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,130 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-09 10:36:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:02,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-09 10:36:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,132 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:36:02,132 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:36:02,133 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:36:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:36:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:36:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-09 10:36:02,136 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-09 10:36:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,136 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-09 10:36:02,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:36:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-09 10:36:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,137 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:02,348 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-09 10:36:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899603784] [2020-10-09 10:36:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899603784] [2020-10-09 10:36:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068677864] [2020-10-09 10:36:02,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:02,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:02,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:02,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136922791] [2020-10-09 10:36:02,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:02,624 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-09 10:36:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,671 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:36:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:02,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,673 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:36:02,673 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 10:36:02,674 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 10:36:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-09 10:36:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:02,677 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,677 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:02,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,678 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,678 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-09 10:36:02,887 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-09 10:36:02,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284381240] [2020-10-09 10:36:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284381240] [2020-10-09 10:36:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494350189] [2020-10-09 10:36:02,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:03,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782221812] [2020-10-09 10:36:03,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:03,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:03,143 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,209 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-09 10:36:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:03,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,211 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:36:03,211 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:36:03,212 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:36:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-09 10:36:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:03,214 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,214 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:03,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,215 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:03,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,419 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-09 10:36:03,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:03,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988006412] [2020-10-09 10:36:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988006412] [2020-10-09 10:36:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31302881] [2020-10-09 10:36:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:03,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854826573] [2020-10-09 10:36:03,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:03,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:03,662 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,743 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-09 10:36:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:03,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,745 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:36:03,745 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:36:03,746 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:36:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:36:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-09 10:36:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:36:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-09 10:36:03,749 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-09 10:36:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,749 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-09 10:36:03,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-09 10:36:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,750 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,750 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:03,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,951 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-09 10:36:03,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:03,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040840395] [2020-10-09 10:36:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040840395] [2020-10-09 10:36:04,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440640885] [2020-10-09 10:36:04,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:04,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:04,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600881138] [2020-10-09 10:36:04,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:04,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:04,191 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-09 10:36:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:04,295 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-09 10:36:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:04,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:04,296 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:36:04,296 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:36:04,297 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:36:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-09 10:36:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-09 10:36:04,300 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-09 10:36:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:04,300 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-09 10:36:04,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-09 10:36:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:04,301 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:04,301 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:04,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-09 10:36:04,511 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-09 10:36:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:04,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765979138] [2020-10-09 10:36:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765979138] [2020-10-09 10:36:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624848201] [2020-10-09 10:36:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:04,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190838191] [2020-10-09 10:36:04,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:04,724 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-09 10:36:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:04,845 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-09 10:36:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:04,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:04,846 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:36:04,846 INFO L226 Difference]: Without dead ends: 164 [2020-10-09 10:36:04,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-09 10:36:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-09 10:36:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-09 10:36:04,849 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-09 10:36:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:04,849 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-09 10:36:04,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-09 10:36:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:04,849 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:04,850 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,050 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-09 10:36:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891267714] [2020-10-09 10:36:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891267714] [2020-10-09 10:36:05,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925460369] [2020-10-09 10:36:05,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:05,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:05,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:05,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42421022] [2020-10-09 10:36:05,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:05,285 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-09 10:36:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:05,466 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-09 10:36:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:05,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:05,469 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:05,469 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:05,469 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-09 10:36:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-09 10:36:05,473 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-09 10:36:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:05,473 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-09 10:36:05,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-09 10:36:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:05,474 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:05,474 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,684 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-09 10:36:05,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119823082] [2020-10-09 10:36:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119823082] [2020-10-09 10:36:05,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208738970] [2020-10-09 10:36:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707523914] [2020-10-09 10:36:06,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:06,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:06,046 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-09 10:36:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:06,123 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-09 10:36:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:06,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:06,125 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:36:06,126 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:36:06,126 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:36:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-09 10:36:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-09 10:36:06,131 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-09 10:36:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:06,131 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-09 10:36:06,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-09 10:36:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:06,133 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:06,133 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:06,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-09 10:36:06,346 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-09 10:36:06,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:06,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590746275] [2020-10-09 10:36:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590746275] [2020-10-09 10:36:06,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678635303] [2020-10-09 10:36:06,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153489710] [2020-10-09 10:36:06,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:06,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:06,711 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:06,839 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-09 10:36:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:06,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:06,841 INFO L225 Difference]: With dead ends: 172 [2020-10-09 10:36:06,841 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:06,841 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-09 10:36:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:06,844 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:06,844 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:06,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:06,845 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:06,845 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:07,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:07,046 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-09 10:36:07,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:07,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732146363] [2020-10-09 10:36:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732146363] [2020-10-09 10:36:07,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205177145] [2020-10-09 10:36:07,125 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:07,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:07,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:07,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795235872] [2020-10-09 10:36:07,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:07,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:07,904 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:08,096 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:08,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:08,098 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:08,098 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:08,099 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-09 10:36:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-09 10:36:08,103 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-09 10:36:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:08,103 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-09 10:36:08,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-09 10:36:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:08,104 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:08,104 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:08,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-09 10:36:08,309 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-09 10:36:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605062383] [2020-10-09 10:36:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605062383] [2020-10-09 10:36:08,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133551724] [2020-10-09 10:36:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:08,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:08,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:08,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845900556] [2020-10-09 10:36:08,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:08,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:08,534 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-09 10:36:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:08,712 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:08,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:08,714 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:08,714 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:08,714 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-09 10:36:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:08,717 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:08,718 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:08,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:08,718 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:08,718 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:08,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-09 10:36:08,919 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-09 10:36:08,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:08,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385543417] [2020-10-09 10:36:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385543417] [2020-10-09 10:36:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460528501] [2020-10-09 10:36:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:09,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447440822] [2020-10-09 10:36:09,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:09,140 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:09,333 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-09 10:36:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:09,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:09,335 INFO L225 Difference]: With dead ends: 184 [2020-10-09 10:36:09,335 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:36:09,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:36:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-09 10:36:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-09 10:36:09,339 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-09 10:36:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:09,340 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-09 10:36:09,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-09 10:36:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:09,340 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:09,341 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:09,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-09 10:36:09,541 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-09 10:36:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:09,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17138654] [2020-10-09 10:36:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17138654] [2020-10-09 10:36:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199617532] [2020-10-09 10:36:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:09,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:09,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910523176] [2020-10-09 10:36:09,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:09,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:09,777 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-09 10:36:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:09,996 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-09 10:36:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:09,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:09,998 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:09,998 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:09,998 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-09 10:36:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-09 10:36:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-09 10:36:10,002 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-09 10:36:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,002 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-09 10:36:10,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-09 10:36:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:10,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,003 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:10,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,214 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:10,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-09 10:36:10,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:10,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536309122] [2020-10-09 10:36:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536309122] [2020-10-09 10:36:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470235025] [2020-10-09 10:36:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:10,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:10,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640300136] [2020-10-09 10:36:10,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:10,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:10,465 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-09 10:36:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:10,628 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-09 10:36:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:10,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:10,630 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:10,630 INFO L226 Difference]: Without dead ends: 174 [2020-10-09 10:36:10,630 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-09 10:36:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-09 10:36:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-09 10:36:10,633 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-09 10:36:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,633 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-09 10:36:10,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-09 10:36:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:10,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,634 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:10,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,835 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-09 10:36:10,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:10,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107302235] [2020-10-09 10:36:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107302235] [2020-10-09 10:36:10,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136415209] [2020-10-09 10:36:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694003091] [2020-10-09 10:36:11,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,123 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:11,341 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:11,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:11,343 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:11,344 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:11,344 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-09 10:36:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-09 10:36:11,349 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-09 10:36:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:11,349 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-09 10:36:11,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-09 10:36:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:11,350 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:11,350 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:11,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,551 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-09 10:36:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:11,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960587562] [2020-10-09 10:36:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960587562] [2020-10-09 10:36:11,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514923657] [2020-10-09 10:36:11,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588414799] [2020-10-09 10:36:11,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,809 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-09 10:36:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:12,014 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:12,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:12,016 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:12,016 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:12,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-09 10:36:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-09 10:36:12,020 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-09 10:36:12,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:12,020 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-09 10:36:12,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-09 10:36:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:12,021 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:12,021 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,233 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-09 10:36:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523208495] [2020-10-09 10:36:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523208495] [2020-10-09 10:36:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915935343] [2020-10-09 10:36:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:12,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:12,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846971340] [2020-10-09 10:36:12,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:12,576 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-09 10:36:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:12,635 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-09 10:36:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:12,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:12,636 INFO L225 Difference]: With dead ends: 182 [2020-10-09 10:36:12,636 INFO L226 Difference]: Without dead ends: 180 [2020-10-09 10:36:12,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-09 10:36:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-09 10:36:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-09 10:36:12,642 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-09 10:36:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:12,642 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-09 10:36:12,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-09 10:36:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:12,643 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:12,643 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-09 10:36:12,852 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-09 10:36:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171914120] [2020-10-09 10:36:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171914120] [2020-10-09 10:36:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055704983] [2020-10-09 10:36:12,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:12,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268442982] [2020-10-09 10:36:13,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,113 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-09 10:36:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:13,281 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-09 10:36:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:13,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:13,284 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:13,284 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:13,284 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-09 10:36:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:13,287 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:13,288 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:13,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:13,288 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:13,289 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:13,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:13,489 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-09 10:36:13,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:13,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824234531] [2020-10-09 10:36:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824234531] [2020-10-09 10:36:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192980242] [2020-10-09 10:36:13,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:13,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616323779] [2020-10-09 10:36:13,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,770 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:13,993 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-09 10:36:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:13,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:13,995 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:36:13,995 INFO L226 Difference]: Without dead ends: 189 [2020-10-09 10:36:13,996 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-09 10:36:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-09 10:36:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-09 10:36:13,999 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-09 10:36:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:14,000 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-09 10:36:14,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-09 10:36:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:14,000 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:14,000 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:14,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:14,212 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-09 10:36:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:14,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076674511] [2020-10-09 10:36:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076674511] [2020-10-09 10:36:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951785604] [2020-10-09 10:36:14,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:14,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:14,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:14,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:14,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21607018] [2020-10-09 10:36:14,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:14,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:14,441 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:14,674 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-09 10:36:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:14,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:14,677 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:14,677 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:14,677 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-09 10:36:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:14,681 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:14,681 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:14,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:14,682 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:14,682 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:14,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-09 10:36:14,894 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-09 10:36:14,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:14,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650964906] [2020-10-09 10:36:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650964906] [2020-10-09 10:36:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433946472] [2020-10-09 10:36:14,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:15,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682797562] [2020-10-09 10:36:15,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,114 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:15,351 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-09 10:36:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:15,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:15,353 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:15,353 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:15,354 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-09 10:36:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-09 10:36:15,357 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-09 10:36:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:15,357 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-09 10:36:15,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-09 10:36:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:15,358 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:15,358 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:15,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:15,559 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-09 10:36:15,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:15,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960456999] [2020-10-09 10:36:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960456999] [2020-10-09 10:36:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656293847] [2020-10-09 10:36:15,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:15,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137360884] [2020-10-09 10:36:15,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,794 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,048 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-09 10:36:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:16,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,050 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:16,050 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:16,050 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-09 10:36:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-09 10:36:16,053 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-09 10:36:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,054 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-09 10:36:16,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-09 10:36:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,054 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,054 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-09 10:36:16,255 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-09 10:36:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430751930] [2020-10-09 10:36:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430751930] [2020-10-09 10:36:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308599931] [2020-10-09 10:36:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:16,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:16,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:16,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:16,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850255383] [2020-10-09 10:36:16,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:16,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:16,523 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-09 10:36:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,612 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-09 10:36:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:16,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,614 INFO L225 Difference]: With dead ends: 178 [2020-10-09 10:36:16,614 INFO L226 Difference]: Without dead ends: 176 [2020-10-09 10:36:16,614 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:36:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-09 10:36:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-09 10:36:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-09 10:36:16,617 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-09 10:36:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,617 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-09 10:36:16,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-09 10:36:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,618 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,618 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,820 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-09 10:36:16,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340952270] [2020-10-09 10:36:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340952270] [2020-10-09 10:36:16,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471162816] [2020-10-09 10:36:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359323505] [2020-10-09 10:36:17,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,081 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-09 10:36:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:17,271 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-09 10:36:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:17,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:17,273 INFO L225 Difference]: With dead ends: 193 [2020-10-09 10:36:17,273 INFO L226 Difference]: Without dead ends: 191 [2020-10-09 10:36:17,274 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-09 10:36:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-09 10:36:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-09 10:36:17,279 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-09 10:36:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:17,279 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-09 10:36:17,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-09 10:36:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:17,280 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:17,280 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:17,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-09 10:36:17,490 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:17,490 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-09 10:36:17,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:17,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484331347] [2020-10-09 10:36:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484331347] [2020-10-09 10:36:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871838358] [2020-10-09 10:36:17,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942156413] [2020-10-09 10:36:17,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,759 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-09 10:36:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:18,009 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-09 10:36:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:18,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:18,012 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:18,012 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:36:18,012 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:36:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-09 10:36:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-09 10:36:18,015 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-09 10:36:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:18,015 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-09 10:36:18,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-09 10:36:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:18,016 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:18,016 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,217 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-09 10:36:18,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965637318] [2020-10-09 10:36:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965637318] [2020-10-09 10:36:18,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114375038] [2020-10-09 10:36:18,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:18,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910419184] [2020-10-09 10:36:18,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:18,477 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-09 10:36:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:18,583 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-09 10:36:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:18,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:18,586 INFO L225 Difference]: With dead ends: 174 [2020-10-09 10:36:18,586 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:36:18,586 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:36:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-09 10:36:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-09 10:36:18,589 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-09 10:36:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:18,589 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-09 10:36:18,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-09 10:36:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:18,590 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:18,590 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-09 10:36:18,790 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-09 10:36:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884524937] [2020-10-09 10:36:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884524937] [2020-10-09 10:36:18,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783305204] [2020-10-09 10:36:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:18,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468282000] [2020-10-09 10:36:19,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,036 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-09 10:36:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:19,275 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-09 10:36:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:19,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:19,277 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:19,277 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:19,277 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-09 10:36:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-09 10:36:19,280 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-09 10:36:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:19,281 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-09 10:36:19,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-09 10:36:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:19,281 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:19,281 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:19,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:19,482 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-09 10:36:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:19,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118857796] [2020-10-09 10:36:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118857796] [2020-10-09 10:36:19,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592288477] [2020-10-09 10:36:19,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:19,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377836506] [2020-10-09 10:36:19,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,719 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:19,867 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-09 10:36:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:19,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:19,869 INFO L225 Difference]: With dead ends: 175 [2020-10-09 10:36:19,869 INFO L226 Difference]: Without dead ends: 173 [2020-10-09 10:36:19,869 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-09 10:36:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-09 10:36:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:19,873 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:19,874 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:19,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:19,874 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:19,874 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:20,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,084 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-09 10:36:20,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:20,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880352966] [2020-10-09 10:36:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880352966] [2020-10-09 10:36:20,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746013738] [2020-10-09 10:36:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:20,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:20,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:20,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003536101] [2020-10-09 10:36:20,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:20,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:20,329 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:20,653 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-09 10:36:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:20,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:20,654 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:20,654 INFO L226 Difference]: Without dead ends: 190 [2020-10-09 10:36:20,655 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-09 10:36:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-09 10:36:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:20,659 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:20,659 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:20,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:20,660 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:20,660 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:20,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,868 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:20,868 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-09 10:36:20,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:20,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239300955] [2020-10-09 10:36:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239300955] [2020-10-09 10:36:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727465360] [2020-10-09 10:36:20,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:21,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:21,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015517600] [2020-10-09 10:36:21,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:21,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:21,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:21,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:21,104 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:21,344 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-09 10:36:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:21,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:21,346 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:21,346 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:21,347 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-09 10:36:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:21,350 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:21,350 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:21,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:21,350 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:21,350 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:21,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:21,551 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-09 10:36:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:21,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166546291] [2020-10-09 10:36:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166546291] [2020-10-09 10:36:21,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648730631] [2020-10-09 10:36:21,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:21,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:21,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:21,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318810542] [2020-10-09 10:36:21,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:21,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:21,798 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:22,257 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-09 10:36:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:22,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:22,260 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:36:22,260 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:22,260 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:22,264 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:22,264 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:22,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:22,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:22,265 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:22,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-09 10:36:22,466 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-09 10:36:22,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:22,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321956466] [2020-10-09 10:36:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321956466] [2020-10-09 10:36:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101656808] [2020-10-09 10:36:22,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:22,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:22,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:22,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:22,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:22,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539419564] [2020-10-09 10:36:22,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:22,704 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:23,043 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-09 10:36:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:23,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:23,046 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:23,046 INFO L226 Difference]: Without dead ends: 197 [2020-10-09 10:36:23,046 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-09 10:36:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-09 10:36:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-09 10:36:23,050 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-09 10:36:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:23,050 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-09 10:36:23,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-09 10:36:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:23,051 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:23,051 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:23,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:23,255 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-09 10:36:23,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:23,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490007001] [2020-10-09 10:36:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490007001] [2020-10-09 10:36:23,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979265682] [2020-10-09 10:36:23,322 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:23,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:23,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:23,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392986783] [2020-10-09 10:36:23,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:23,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:23,538 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-09 10:36:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:23,809 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-09 10:36:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:23,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:23,811 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:23,811 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:23,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-09 10:36:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:23,815 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:23,816 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:23,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:23,816 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:23,817 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:24,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-09 10:36:24,019 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-09 10:36:24,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:24,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80921435] [2020-10-09 10:36:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80921435] [2020-10-09 10:36:24,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078836506] [2020-10-09 10:36:24,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:24,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:24,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285285792] [2020-10-09 10:36:24,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:24,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:24,342 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:24,737 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-09 10:36:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:36:24,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:24,738 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:36:24,738 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:24,738 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:24,741 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:24,741 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:24,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:24,742 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:24,742 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:24,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-09 10:36:24,943 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-09 10:36:24,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587896553] [2020-10-09 10:36:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587896553] [2020-10-09 10:36:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569247109] [2020-10-09 10:36:25,012 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:25,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:25,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:25,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:25,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:25,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163967236] [2020-10-09 10:36:25,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:25,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:25,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:25,209 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:25,722 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-09 10:36:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:25,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:25,724 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:36:25,725 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:36:25,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:36:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:36:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-09 10:36:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:36:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-09 10:36:25,729 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-09 10:36:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:25,730 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-09 10:36:25,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-09 10:36:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:25,730 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:25,730 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:25,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-09 10:36:25,937 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-09 10:36:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:25,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696387060] [2020-10-09 10:36:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696387060] [2020-10-09 10:36:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771859202] [2020-10-09 10:36:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:26,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:26,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:28,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:28,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:28,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:28,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216774670] [2020-10-09 10:36:28,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:28,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:28,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-09 10:36:28,269 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-09 10:36:32,555 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:36:36,783 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:36:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:37,211 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-09 10:36:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:37,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:37,213 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:36:37,213 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:36:37,213 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-09 10:36:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:36:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-09 10:36:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-09 10:36:37,217 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-09 10:36:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:37,217 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-09 10:36:37,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-09 10:36:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:37,218 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:37,218 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:37,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-09 10:36:37,427 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-09 10:36:37,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:37,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991359583] [2020-10-09 10:36:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991359583] [2020-10-09 10:36:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339554597] [2020-10-09 10:36:37,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:37,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:37,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:37,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:37,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:37,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456634421] [2020-10-09 10:36:37,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:37,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:37,692 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-09 10:36:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:38,202 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-09 10:36:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:38,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:38,203 INFO L225 Difference]: With dead ends: 219 [2020-10-09 10:36:38,203 INFO L226 Difference]: Without dead ends: 214 [2020-10-09 10:36:38,204 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:36:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-09 10:36:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-09 10:36:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-09 10:36:38,207 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-09 10:36:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:38,208 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-09 10:36:38,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-09 10:36:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:38,208 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:38,208 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:38,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:38,419 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-09 10:36:38,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:38,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625107203] [2020-10-09 10:36:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:38,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625107203] [2020-10-09 10:36:38,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017181984] [2020-10-09 10:36:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:38,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:38,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:38,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:38,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:38,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984074406] [2020-10-09 10:36:38,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:38,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:38,672 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-09 10:36:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:38,938 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-09 10:36:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:38,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:38,940 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:36:38,940 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:36:38,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:36:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-09 10:36:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-09 10:36:38,944 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-09 10:36:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:38,944 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-09 10:36:38,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-09 10:36:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:38,945 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:38,945 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:39,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:39,149 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-09 10:36:39,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:39,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894242352] [2020-10-09 10:36:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:39,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894242352] [2020-10-09 10:36:39,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861108110] [2020-10-09 10:36:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482495875] [2020-10-09 10:36:39,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:39,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:39,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:39,398 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-09 10:36:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:39,673 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-09 10:36:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:39,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:39,674 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:39,674 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:36:39,674 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:36:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-09 10:36:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-09 10:36:39,680 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-09 10:36:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:39,680 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-09 10:36:39,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-09 10:36:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:39,681 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:39,682 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:39,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-09 10:36:39,884 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-09 10:36:39,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:39,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429954545] [2020-10-09 10:36:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:39,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429954545] [2020-10-09 10:36:39,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382056425] [2020-10-09 10:36:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:39,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:40,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:40,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197237335] [2020-10-09 10:36:40,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:40,149 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:40,431 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-09 10:36:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:40,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:40,432 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:36:40,432 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:36:40,433 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:36:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-09 10:36:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-09 10:36:40,436 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-09 10:36:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:40,436 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-09 10:36:40,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-09 10:36:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:40,436 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:40,436 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:40,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-09 10:36:40,637 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-09 10:36:40,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:40,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505842057] [2020-10-09 10:36:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505842057] [2020-10-09 10:36:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556157285] [2020-10-09 10:36:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:40,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:40,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:40,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868488418] [2020-10-09 10:36:40,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:40,940 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-09 10:36:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:41,523 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-09 10:36:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:36:41,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:41,526 INFO L225 Difference]: With dead ends: 214 [2020-10-09 10:36:41,526 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:36:41,526 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:36:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-09 10:36:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-09 10:36:41,531 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-09 10:36:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:41,532 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-09 10:36:41,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-09 10:36:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:41,532 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:41,533 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:41,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-09 10:36:41,733 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-09 10:36:41,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:41,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230237081] [2020-10-09 10:36:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230237081] [2020-10-09 10:36:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233653259] [2020-10-09 10:36:41,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:41,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:41,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:41,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:42,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:42,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642510047] [2020-10-09 10:36:42,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:42,071 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:42,440 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-09 10:36:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:42,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:42,442 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:36:42,442 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:36:42,442 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:36:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:36:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-09 10:36:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:36:42,446 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:36:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:42,446 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:36:42,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:36:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:42,447 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:42,447 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:42,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:42,656 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:42,656 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-09 10:36:42,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:42,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854229877] [2020-10-09 10:36:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:42,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854229877] [2020-10-09 10:36:42,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256187421] [2020-10-09 10:36:42,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:42,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:42,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201223892] [2020-10-09 10:36:42,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:42,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:42,899 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:43,322 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-09 10:36:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:36:43,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:43,324 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:36:43,324 INFO L226 Difference]: Without dead ends: 209 [2020-10-09 10:36:43,324 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-09 10:36:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-09 10:36:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:43,328 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:43,328 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:43,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:43,328 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:43,329 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:43,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:43,529 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-09 10:36:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:43,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580611218] [2020-10-09 10:36:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580611218] [2020-10-09 10:36:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589576862] [2020-10-09 10:36:43,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:43,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:43,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:43,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:43,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182962674] [2020-10-09 10:36:43,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:43,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:43,765 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:44,251 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-09 10:36:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:44,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:44,252 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:36:44,252 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:36:44,252 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:36:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:36:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-09 10:36:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:44,255 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:44,256 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:44,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:44,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:44,256 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:44,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-09 10:36:44,457 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-09 10:36:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:44,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83434028] [2020-10-09 10:36:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83434028] [2020-10-09 10:36:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790097587] [2020-10-09 10:36:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:44,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:44,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:44,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:44,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:44,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447901232] [2020-10-09 10:36:44,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:44,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:44,723 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:45,332 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-09 10:36:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:36:45,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:45,333 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:36:45,334 INFO L226 Difference]: Without dead ends: 222 [2020-10-09 10:36:45,334 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:36:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-09 10:36:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-09 10:36:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:36:45,339 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:36:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:45,339 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:36:45,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:36:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:45,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:45,340 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:45,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-09 10:36:45,550 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:45,550 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-09 10:36:45,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:45,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839337369] [2020-10-09 10:36:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839337369] [2020-10-09 10:36:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450431414] [2020-10-09 10:36:45,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:45,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:45,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:45,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:45,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939601144] [2020-10-09 10:36:45,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:45,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:45,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:45,793 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:36:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:46,277 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-09 10:36:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:36:46,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:46,278 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:36:46,279 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:36:46,282 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:36:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:36:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-09 10:36:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:36:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:36:46,285 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:36:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:46,286 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:36:46,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:36:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:46,286 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:46,286 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:46,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:46,493 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-09 10:36:46,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:46,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168009590] [2020-10-09 10:36:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:46,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168009590] [2020-10-09 10:36:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480751061] [2020-10-09 10:36:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:46,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:46,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:46,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:46,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:46,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928725040] [2020-10-09 10:36:46,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:46,724 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:36:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:47,317 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-09 10:36:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:36:47,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:47,318 INFO L225 Difference]: With dead ends: 240 [2020-10-09 10:36:47,319 INFO L226 Difference]: Without dead ends: 232 [2020-10-09 10:36:47,319 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:36:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-09 10:36:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-09 10:36:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:36:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-09 10:36:47,322 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-09 10:36:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:47,322 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-09 10:36:47,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-09 10:36:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:47,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:47,323 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:47,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-09 10:36:47,524 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-09 10:36:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:47,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831635769] [2020-10-09 10:36:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:47,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831635769] [2020-10-09 10:36:47,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774966727] [2020-10-09 10:36:47,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:47,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:47,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:47,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:47,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:47,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744497256] [2020-10-09 10:36:47,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:47,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:47,791 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-09 10:36:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:48,421 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-09 10:36:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:36:48,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:48,422 INFO L225 Difference]: With dead ends: 238 [2020-10-09 10:36:48,422 INFO L226 Difference]: Without dead ends: 230 [2020-10-09 10:36:48,422 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:36:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-09 10:36:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-09 10:36:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:36:48,427 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:36:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:48,427 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:36:48,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:36:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:48,428 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:48,428 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:48,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:48,638 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-09 10:36:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:48,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124494854] [2020-10-09 10:36:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:48,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124494854] [2020-10-09 10:36:48,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657674775] [2020-10-09 10:36:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:48,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:48,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:48,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526671772] [2020-10-09 10:36:48,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:48,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:48,885 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:36:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:49,145 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-09 10:36:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:49,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:49,146 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:49,146 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:36:49,147 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:36:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-09 10:36:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:36:49,150 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:36:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:49,151 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:36:49,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:36:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:49,151 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:49,151 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:49,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-09 10:36:49,354 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-09 10:36:49,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333994186] [2020-10-09 10:36:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333994186] [2020-10-09 10:36:49,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438096883] [2020-10-09 10:36:49,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:49,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:49,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:49,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:49,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:49,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73688606] [2020-10-09 10:36:49,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:49,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:49,599 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:36:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:50,068 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-09 10:36:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:50,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:50,070 INFO L225 Difference]: With dead ends: 206 [2020-10-09 10:36:50,070 INFO L226 Difference]: Without dead ends: 204 [2020-10-09 10:36:50,070 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-09 10:36:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-09 10:36:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-09 10:36:50,073 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-09 10:36:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:50,073 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-09 10:36:50,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-09 10:36:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:50,073 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:50,074 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:50,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:50,274 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-09 10:36:50,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:50,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918178971] [2020-10-09 10:36:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918178971] [2020-10-09 10:36:50,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034391651] [2020-10-09 10:36:50,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:50,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:50,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:50,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:51,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:51,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:36:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871516738] [2020-10-09 10:36:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:36:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:36:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-09 10:36:51,648 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-09 10:36:53,503 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-09 10:37:14,251 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-09 10:37:41,683 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-09 10:38:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:02,937 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-10-09 10:38:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:38:02,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-09 10:38:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:02,939 INFO L225 Difference]: With dead ends: 252 [2020-10-09 10:38:02,939 INFO L226 Difference]: Without dead ends: 247 [2020-10-09 10:38:02,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-09 10:38:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-09 10:38:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-10-09 10:38:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:38:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-09 10:38:02,944 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-09 10:38:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:02,944 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-09 10:38:02,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:38:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-09 10:38:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:02,945 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:02,945 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:03,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-09 10:38:03,156 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-09 10:38:03,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:03,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745316778] [2020-10-09 10:38:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745316778] [2020-10-09 10:38:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840725445] [2020-10-09 10:38:03,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:03,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:03,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259116525] [2020-10-09 10:38:03,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:03,410 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-09 10:38:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:03,634 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:38:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:03,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:03,635 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:38:03,635 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:38:03,635 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:38:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:38:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-09 10:38:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:38:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-09 10:38:03,638 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-09 10:38:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:03,638 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-09 10:38:03,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-09 10:38:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:03,638 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:03,639 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:03,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:03,840 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-09 10:38:03,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915681494] [2020-10-09 10:38:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:03,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915681494] [2020-10-09 10:38:03,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794493637] [2020-10-09 10:38:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:03,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:03,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:04,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:04,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90637725] [2020-10-09 10:38:04,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:04,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:04,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:04,110 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-09 10:38:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:04,432 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-09 10:38:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:04,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:04,433 INFO L225 Difference]: With dead ends: 205 [2020-10-09 10:38:04,433 INFO L226 Difference]: Without dead ends: 203 [2020-10-09 10:38:04,433 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:38:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-09 10:38:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-09 10:38:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:38:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-09 10:38:04,437 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-09 10:38:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:04,437 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-09 10:38:04,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-09 10:38:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:04,438 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:04,438 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:04,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:04,647 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-09 10:38:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:04,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362764969] [2020-10-09 10:38:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362764969] [2020-10-09 10:38:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913043823] [2020-10-09 10:38:04,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:04,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:04,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:04,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557883972] [2020-10-09 10:38:04,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:04,903 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-09 10:38:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:05,178 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:38:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:05,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:05,180 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:38:05,180 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:38:05,181 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:38:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:38:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-09 10:38:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:38:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-09 10:38:05,184 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-09 10:38:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:05,184 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-09 10:38:05,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-09 10:38:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:05,185 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:05,185 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:05,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:05,385 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-09 10:38:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:05,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181112437] [2020-10-09 10:38:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:05,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181112437] [2020-10-09 10:38:05,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518750515] [2020-10-09 10:38:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:05,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:05,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:05,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078837829] [2020-10-09 10:38:05,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:05,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:05,649 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-09 10:38:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:05,899 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:38:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:05,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:05,900 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:38:05,901 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:38:05,901 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:38:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:38:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-09 10:38:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:38:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-09 10:38:05,904 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-09 10:38:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:05,904 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-09 10:38:05,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-09 10:38:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:05,905 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:05,905 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:06,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-09 10:38:06,112 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-09 10:38:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:06,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35176869] [2020-10-09 10:38:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35176869] [2020-10-09 10:38:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877339313] [2020-10-09 10:38:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:06,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:06,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:06,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:06,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303762234] [2020-10-09 10:38:06,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:06,379 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-09 10:38:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:06,723 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-09 10:38:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:38:06,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:06,724 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:38:06,724 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:38:06,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:38:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-09 10:38:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:38:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-09 10:38:06,728 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-09 10:38:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:06,728 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-09 10:38:06,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-09 10:38:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:06,729 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:06,729 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:06,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:06,939 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-09 10:38:06,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:06,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903879761] [2020-10-09 10:38:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903879761] [2020-10-09 10:38:07,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881263523] [2020-10-09 10:38:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:07,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:07,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:07,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112354227] [2020-10-09 10:38:07,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:07,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:07,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:07,206 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-09 10:38:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:07,539 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-09 10:38:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:38:07,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:07,541 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:38:07,541 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:38:07,541 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:38:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-09 10:38:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:38:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-09 10:38:07,544 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-09 10:38:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:07,544 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-09 10:38:07,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-09 10:38:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:07,545 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:07,545 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:07,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-09 10:38:07,746 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:07,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-09 10:38:07,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:07,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740500799] [2020-10-09 10:38:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:07,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740500799] [2020-10-09 10:38:07,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304809161] [2020-10-09 10:38:07,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:07,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:08,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:08,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:08,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905458819] [2020-10-09 10:38:08,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:08,005 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-09 10:38:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:08,331 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:38:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:08,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:08,333 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:38:08,333 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:38:08,333 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:38:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-09 10:38:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:38:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-09 10:38:08,336 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-09 10:38:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:08,336 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-09 10:38:08,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-09 10:38:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:08,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:08,337 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:08,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-09 10:38:08,538 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-09 10:38:08,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:08,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136144849] [2020-10-09 10:38:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:08,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136144849] [2020-10-09 10:38:08,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445171215] [2020-10-09 10:38:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:08,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:08,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:08,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:08,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001176598] [2020-10-09 10:38:08,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:08,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:08,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:08,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:08,800 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-09 10:38:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:09,276 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-09 10:38:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:38:09,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:09,277 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:38:09,277 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:38:09,277 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:38:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:38:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-09 10:38:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:38:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:38:09,281 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:38:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:09,282 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:38:09,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:38:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:09,282 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:09,282 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:09,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:09,492 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-09 10:38:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:09,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856895145] [2020-10-09 10:38:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:09,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856895145] [2020-10-09 10:38:09,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641645635] [2020-10-09 10:38:09,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:09,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:09,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:09,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:09,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645401035] [2020-10-09 10:38:09,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:09,741 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:38:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:10,129 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-09 10:38:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:38:10,130 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:10,131 INFO L225 Difference]: With dead ends: 196 [2020-10-09 10:38:10,131 INFO L226 Difference]: Without dead ends: 194 [2020-10-09 10:38:10,131 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-09 10:38:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-09 10:38:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:38:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:38:10,141 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:38:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:10,142 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:38:10,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:38:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:10,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:10,142 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:10,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:10,343 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-09 10:38:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:10,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881592432] [2020-10-09 10:38:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881592432] [2020-10-09 10:38:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582929223] [2020-10-09 10:38:10,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:10,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:10,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:10,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:10,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629853303] [2020-10-09 10:38:10,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:10,578 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:38:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:10,888 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-09 10:38:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:10,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:10,890 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:38:10,890 INFO L226 Difference]: Without dead ends: 186 [2020-10-09 10:38:10,890 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-09 10:38:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-09 10:38:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:38:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:38:10,893 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:38:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:10,894 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:38:10,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:38:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:10,894 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:10,894 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:11,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-09 10:38:11,095 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-09 10:38:11,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:11,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910483663] [2020-10-09 10:38:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:11,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910483663] [2020-10-09 10:38:11,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154946291] [2020-10-09 10:38:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:11,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:11,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:11,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:11,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:11,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:11,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4464882] [2020-10-09 10:38:11,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:11,379 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:38:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:11,970 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-09 10:38:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:38:11,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:11,971 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:38:11,971 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:38:11,971 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:38:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:38:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-09 10:38:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:38:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:38:11,975 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:38:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:11,975 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:38:11,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:38:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:11,975 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:11,975 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:12,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:12,176 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-09 10:38:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:12,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429120236] [2020-10-09 10:38:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:12,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429120236] [2020-10-09 10:38:12,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116771152] [2020-10-09 10:38:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:12,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:12,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:12,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:12,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326143434] [2020-10-09 10:38:12,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:12,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:12,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:12,458 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:38:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:13,017 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-09 10:38:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:38:13,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:13,018 INFO L225 Difference]: With dead ends: 222 [2020-10-09 10:38:13,019 INFO L226 Difference]: Without dead ends: 220 [2020-10-09 10:38:13,019 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:38:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-09 10:38:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-09 10:38:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:38:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:38:13,022 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:38:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:13,022 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:38:13,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:38:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:13,023 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:13,023 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:13,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:13,223 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-09 10:38:13,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:13,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499651838] [2020-10-09 10:38:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:13,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499651838] [2020-10-09 10:38:13,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422157093] [2020-10-09 10:38:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:13,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:13,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:13,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:13,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:13,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920678327] [2020-10-09 10:38:13,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:13,506 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:38:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:14,302 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-09 10:38:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:38:14,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:14,305 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:38:14,305 INFO L226 Difference]: Without dead ends: 246 [2020-10-09 10:38:14,305 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:38:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-09 10:38:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-09 10:38:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:38:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-09 10:38:14,311 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-09 10:38:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:14,311 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-09 10:38:14,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-09 10:38:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:14,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:14,312 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:14,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:14,524 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-09 10:38:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:14,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857265137] [2020-10-09 10:38:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857265137] [2020-10-09 10:38:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534997006] [2020-10-09 10:38:14,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:14,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:14,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:14,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:14,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735001146] [2020-10-09 10:38:14,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:14,794 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-09 10:38:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:15,590 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-09 10:38:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:38:15,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:15,591 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:38:15,591 INFO L226 Difference]: Without dead ends: 238 [2020-10-09 10:38:15,592 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:38:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-09 10:38:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-09 10:38:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:38:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-09 10:38:15,596 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-09 10:38:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:15,596 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-09 10:38:15,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-09 10:38:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:15,597 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:15,597 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:15,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-09 10:38:15,805 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-09 10:38:15,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:15,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039359702] [2020-10-09 10:38:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:15,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039359702] [2020-10-09 10:38:15,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283813673] [2020-10-09 10:38:15,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:15,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:15,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:15,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:16,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:16,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159179112] [2020-10-09 10:38:16,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:16,065 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-09 10:38:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:16,474 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-09 10:38:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:38:16,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:16,476 INFO L225 Difference]: With dead ends: 208 [2020-10-09 10:38:16,476 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:38:16,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:38:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:38:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-09 10:38:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:38:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-09 10:38:16,479 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-09 10:38:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:16,479 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-09 10:38:16,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-09 10:38:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:16,479 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:16,479 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:16,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-09 10:38:16,680 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-09 10:38:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:16,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471142310] [2020-10-09 10:38:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:16,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471142310] [2020-10-09 10:38:16,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731226157] [2020-10-09 10:38:16,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:16,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:16,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:16,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:16,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538044404] [2020-10-09 10:38:16,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:16,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:16,923 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-09 10:38:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:17,473 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-09 10:38:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:38:17,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:17,475 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:38:17,475 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:38:17,475 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:38:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:38:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-09 10:38:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:38:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:38:17,479 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:38:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:17,479 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:38:17,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:38:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:17,479 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:17,479 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:17,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-09 10:38:17,684 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-09 10:38:17,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:17,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615446292] [2020-10-09 10:38:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:17,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615446292] [2020-10-09 10:38:17,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996319378] [2020-10-09 10:38:17,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:17,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:17,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:17,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:17,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664392946] [2020-10-09 10:38:17,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:17,924 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:38:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:18,506 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-09 10:38:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:38:18,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:18,508 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:38:18,508 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:38:18,508 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:38:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:38:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-09 10:38:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:38:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:38:18,511 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:38:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:18,512 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:38:18,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:38:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:18,512 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:18,512 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:18,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-09 10:38:18,713 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-09 10:38:18,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:18,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864298186] [2020-10-09 10:38:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864298186] [2020-10-09 10:38:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707076518] [2020-10-09 10:38:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:18,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:18,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:18,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:18,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:18,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188197917] [2020-10-09 10:38:18,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:18,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:18,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:18,952 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:38:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:19,607 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-09 10:38:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:38:19,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:19,612 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:38:19,612 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:38:19,613 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:38:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:38:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-09 10:38:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-09 10:38:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-09 10:38:19,615 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-09 10:38:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:19,615 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-09 10:38:19,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-09 10:38:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:19,616 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:19,616 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:19,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-09 10:38:19,817 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-09 10:38:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761892734] [2020-10-09 10:38:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:19,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761892734] [2020-10-09 10:38:19,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102214362] [2020-10-09 10:38:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:19,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:19,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:38:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:20,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:20,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:20,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:38:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965757298] [2020-10-09 10:38:20,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:38:20,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:20,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:38:20,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:38:20,066 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-09 10:38:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:20,693 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-09 10:38:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:38:20,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:38:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:20,694 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:38:20,694 INFO L226 Difference]: Without dead ends: 224 [2020-10-09 10:38:20,695 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:38:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-09 10:38:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-09 10:38:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:38:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-09 10:38:20,698 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-09 10:38:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:20,698 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-09 10:38:20,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:38:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-09 10:38:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:20,698 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:20,698 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:20,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:20,899 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:20,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-09 10:38:20,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:20,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63543615] [2020-10-09 10:38:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63543615] [2020-10-09 10:38:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315002144] [2020-10-09 10:38:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:21,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:38:21,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:21,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:38:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:21,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:21,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:38:21,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785750888] [2020-10-09 10:38:21,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:38:21,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:38:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:38:21,247 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-09 10:38:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:21,575 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-09 10:38:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:21,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-09 10:38:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:21,578 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:38:21,578 INFO L226 Difference]: Without dead ends: 180 [2020-10-09 10:38:21,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-09 10:38:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-09 10:38:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:38:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-09 10:38:21,583 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-09 10:38:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:21,583 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-09 10:38:21,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:38:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-09 10:38:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:21,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:21,585 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:21,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-09 10:38:21,785 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-09 10:38:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:21,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700204635] [2020-10-09 10:38:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700204635] [2020-10-09 10:38:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37359722] [2020-10-09 10:38:22,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:22,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:38:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:22,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:22,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:22,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932276612] [2020-10-09 10:38:22,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:22,287 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-09 10:38:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:22,351 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-09 10:38:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:38:22,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:22,352 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:38:22,352 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:38:22,353 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:38:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-09 10:38:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:38:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-09 10:38:22,355 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-09 10:38:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:22,355 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-09 10:38:22,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-09 10:38:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:22,356 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:22,356 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:22,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-09 10:38:22,557 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-09 10:38:22,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:22,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600750067] [2020-10-09 10:38:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600750067] [2020-10-09 10:38:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431614756] [2020-10-09 10:38:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:22,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:22,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:22,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:22,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:22,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65077333] [2020-10-09 10:38:22,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:22,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:22,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:22,933 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-09 10:38:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:23,020 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-09 10:38:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:38:23,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:23,022 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:38:23,022 INFO L226 Difference]: Without dead ends: 194 [2020-10-09 10:38:23,022 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:38:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-09 10:38:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-09 10:38:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:38:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-09 10:38:23,025 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-09 10:38:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:23,026 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-09 10:38:23,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-09 10:38:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:23,026 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:23,026 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:23,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:23,236 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-09 10:38:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:23,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36923566] [2020-10-09 10:38:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:23,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36923566] [2020-10-09 10:38:23,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416605040] [2020-10-09 10:38:23,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:23,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:38:23,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:23,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:23,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:23,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138766045] [2020-10-09 10:38:23,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:23,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:23,601 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-09 10:38:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:23,703 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-09 10:38:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:38:23,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:23,704 INFO L225 Difference]: With dead ends: 196 [2020-10-09 10:38:23,704 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:38:23,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:38:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:38:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-09 10:38:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-09 10:38:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-09 10:38:23,707 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-09 10:38:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:23,708 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-09 10:38:23,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-09 10:38:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:23,708 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:23,708 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:23,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:23,909 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-09 10:38:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:23,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056426710] [2020-10-09 10:38:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056426710] [2020-10-09 10:38:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237613042] [2020-10-09 10:38:24,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:24,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:38:24,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:24,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:24,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:24,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:24,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255095367] [2020-10-09 10:38:24,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:24,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:24,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:24,246 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-09 10:38:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:24,386 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-09 10:38:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:24,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:24,387 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:38:24,387 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:38:24,387 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:38:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:38:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-09 10:38:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-09 10:38:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-09 10:38:24,391 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-09 10:38:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:24,391 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-09 10:38:24,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-09 10:38:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:24,391 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:24,392 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:24,598 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-09 10:38:24,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:24,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201015947] [2020-10-09 10:38:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:24,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201015947] [2020-10-09 10:38:24,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68130798] [2020-10-09 10:38:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:24,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:24,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:24,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261513114] [2020-10-09 10:38:24,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:24,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:24,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:24,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:24,927 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-09 10:38:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:25,109 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-09 10:38:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:38:25,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:25,111 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:38:25,111 INFO L226 Difference]: Without dead ends: 191 [2020-10-09 10:38:25,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:38:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-09 10:38:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-09 10:38:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-09 10:38:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-09 10:38:25,115 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-09 10:38:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:25,115 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-09 10:38:25,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-09 10:38:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:25,116 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:25,116 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:25,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:25,326 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-09 10:38:25,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:25,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100197267] [2020-10-09 10:38:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100197267] [2020-10-09 10:38:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934601647] [2020-10-09 10:38:25,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:25,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:25,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:25,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:25,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:25,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404825956] [2020-10-09 10:38:25,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:25,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:25,643 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-09 10:38:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:25,841 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-09 10:38:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:25,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:25,842 INFO L225 Difference]: With dead ends: 193 [2020-10-09 10:38:25,842 INFO L226 Difference]: Without dead ends: 190 [2020-10-09 10:38:25,843 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:38:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-09 10:38:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-09 10:38:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-09 10:38:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-09 10:38:25,846 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-09 10:38:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:25,846 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-09 10:38:25,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-09 10:38:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:38:25,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:25,847 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:26,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-09 10:38:26,047 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-09 10:38:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:26,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092426249] [2020-10-09 10:38:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092426249] [2020-10-09 10:38:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578041022] [2020-10-09 10:38:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:26,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:38:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:26,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:38:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:26,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:26,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:26,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419164108] [2020-10-09 10:38:26,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:26,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:26,369 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-09 10:38:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:26,623 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-09 10:38:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:26,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:38:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:26,625 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:38:26,625 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:38:26,626 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:38:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-09 10:38:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-09 10:38:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-09 10:38:26,630 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-09 10:38:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:26,630 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-09 10:38:26,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-09 10:38:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:26,631 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:26,631 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:26,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-09 10:38:26,841 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-09 10:38:26,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:26,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616487011] [2020-10-09 10:38:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:26,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616487011] [2020-10-09 10:38:26,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879605203] [2020-10-09 10:38:26,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:27,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:27,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:27,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:27,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807705528] [2020-10-09 10:38:27,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:27,191 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-09 10:38:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:27,254 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-09 10:38:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:38:27,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:27,256 INFO L225 Difference]: With dead ends: 188 [2020-10-09 10:38:27,256 INFO L226 Difference]: Without dead ends: 186 [2020-10-09 10:38:27,257 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-09 10:38:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-09 10:38:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:38:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-09 10:38:27,260 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-09 10:38:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-09 10:38:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-09 10:38:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:27,261 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:27,261 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:27,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-09 10:38:27,461 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-09 10:38:27,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:27,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036281021] [2020-10-09 10:38:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036281021] [2020-10-09 10:38:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300706253] [2020-10-09 10:38:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:27,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:27,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:27,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356021154] [2020-10-09 10:38:27,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:27,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:27,806 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-09 10:38:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:28,039 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-09 10:38:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:38:28,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:28,041 INFO L225 Difference]: With dead ends: 199 [2020-10-09 10:38:28,041 INFO L226 Difference]: Without dead ends: 197 [2020-10-09 10:38:28,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:38:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-09 10:38:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-09 10:38:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-09 10:38:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-09 10:38:28,045 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-09 10:38:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:28,045 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-09 10:38:28,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-09 10:38:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:28,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:28,045 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:28,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-09 10:38:28,246 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-09 10:38:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:28,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696504805] [2020-10-09 10:38:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:28,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696504805] [2020-10-09 10:38:28,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472082461] [2020-10-09 10:38:28,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:29,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:29,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:29,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977700004] [2020-10-09 10:38:29,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:29,121 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-09 10:38:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:29,427 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-09 10:38:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:38:29,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:29,429 INFO L225 Difference]: With dead ends: 210 [2020-10-09 10:38:29,429 INFO L226 Difference]: Without dead ends: 208 [2020-10-09 10:38:29,429 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:38:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-09 10:38:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-09 10:38:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-09 10:38:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-09 10:38:29,432 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-09 10:38:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:29,432 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-09 10:38:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-09 10:38:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:29,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:29,433 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:29,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-09 10:38:29,634 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-09 10:38:29,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:29,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334971983] [2020-10-09 10:38:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334971983] [2020-10-09 10:38:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640529716] [2020-10-09 10:38:29,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:29,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:29,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:32,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:32,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621781089] [2020-10-09 10:38:32,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:32,264 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-09 10:38:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:32,601 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-09 10:38:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:32,602 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:32,602 INFO L225 Difference]: With dead ends: 210 [2020-10-09 10:38:32,602 INFO L226 Difference]: Without dead ends: 208 [2020-10-09 10:38:32,603 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-09 10:38:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-09 10:38:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-09 10:38:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-09 10:38:32,606 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-09 10:38:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:32,606 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-09 10:38:32,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-09 10:38:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:32,607 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:32,607 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:32,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-09 10:38:32,811 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:32,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-09 10:38:32,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:32,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946517589] [2020-10-09 10:38:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946517589] [2020-10-09 10:38:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424354647] [2020-10-09 10:38:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:33,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:38:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:37,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:37,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:37,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552945921] [2020-10-09 10:38:37,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:38:37,294 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-09 10:38:41,516 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:38:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:41,788 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-09 10:38:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:38:41,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:41,791 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:38:41,791 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:38:41,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-09 10:38:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:38:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-09 10:38:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:38:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:38:41,795 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:38:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:41,795 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:38:41,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:38:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:41,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:41,796 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:41,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:41,998 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-09 10:38:41,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:41,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818226005] [2020-10-09 10:38:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:42,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818226005] [2020-10-09 10:38:42,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517126886] [2020-10-09 10:38:42,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:42,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:42,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:42,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504042382] [2020-10-09 10:38:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:42,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:42,441 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:38:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:42,843 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-09 10:38:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:38:42,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:42,844 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:38:42,844 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:38:42,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:38:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-09 10:38:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-09 10:38:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-09 10:38:42,850 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-09 10:38:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:42,851 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-09 10:38:42,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-09 10:38:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:42,851 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:42,851 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:43,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:43,060 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:43,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-09 10:38:43,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:43,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069986785] [2020-10-09 10:38:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069986785] [2020-10-09 10:38:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126748388] [2020-10-09 10:38:43,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:43,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:43,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:43,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851802697] [2020-10-09 10:38:43,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:43,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:43,402 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-09 10:38:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:43,762 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-09 10:38:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:38:43,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:43,764 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:38:43,764 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:38:43,765 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:38:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:38:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-09 10:38:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:38:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:38:43,768 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:38:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:43,768 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:38:43,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:38:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:43,769 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:43,769 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:43,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:43,969 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-09 10:38:43,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911497481] [2020-10-09 10:38:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:44,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911497481] [2020-10-09 10:38:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811258745] [2020-10-09 10:38:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:44,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:38:44,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:44,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:44,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:44,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122451873] [2020-10-09 10:38:44,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:44,305 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:38:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:44,682 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-09 10:38:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:44,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:44,683 INFO L225 Difference]: With dead ends: 224 [2020-10-09 10:38:44,684 INFO L226 Difference]: Without dead ends: 222 [2020-10-09 10:38:44,684 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:38:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-09 10:38:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-09 10:38:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:38:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:38:44,686 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:38:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:38:44,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:38:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:44,687 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:44,687 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:44,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:44,891 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-09 10:38:44,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:44,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869515321] [2020-10-09 10:38:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:45,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869515321] [2020-10-09 10:38:45,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124261627] [2020-10-09 10:38:45,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:45,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:45,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459075995] [2020-10-09 10:38:45,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:45,207 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:38:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:45,534 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-09 10:38:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:45,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:45,535 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:38:45,535 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:38:45,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:38:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-09 10:38:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:38:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:38:45,538 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:38:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:45,538 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:38:45,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:38:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:45,539 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:45,539 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:45,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:45,740 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-09 10:38:45,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:45,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80731299] [2020-10-09 10:38:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:45,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80731299] [2020-10-09 10:38:45,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386736656] [2020-10-09 10:38:45,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:45,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:45,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:46,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:46,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965308260] [2020-10-09 10:38:46,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:46,089 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:38:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:46,371 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-09 10:38:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:46,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:46,373 INFO L225 Difference]: With dead ends: 206 [2020-10-09 10:38:46,373 INFO L226 Difference]: Without dead ends: 204 [2020-10-09 10:38:46,373 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-09 10:38:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-09 10:38:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-09 10:38:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-09 10:38:46,376 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-09 10:38:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:46,376 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-09 10:38:46,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-09 10:38:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:46,377 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:46,377 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:46,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-09 10:38:46,577 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-09 10:38:46,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:46,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110877756] [2020-10-09 10:38:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110877756] [2020-10-09 10:38:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666813102] [2020-10-09 10:38:46,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:38:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:46,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:46,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:46,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:46,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95811730] [2020-10-09 10:38:46,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:46,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:46,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:46,914 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-09 10:38:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:47,197 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-09 10:38:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:47,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:47,198 INFO L225 Difference]: With dead ends: 207 [2020-10-09 10:38:47,198 INFO L226 Difference]: Without dead ends: 205 [2020-10-09 10:38:47,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-09 10:38:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-09 10:38:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:38:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-09 10:38:47,204 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-09 10:38:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:47,204 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-09 10:38:47,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-09 10:38:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:47,205 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:47,205 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:47,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-09 10:38:47,414 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-09 10:38:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:47,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79207415] [2020-10-09 10:38:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79207415] [2020-10-09 10:38:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248686415] [2020-10-09 10:38:47,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:47,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:47,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:47,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:47,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384501193] [2020-10-09 10:38:47,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:47,764 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-09 10:38:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:48,061 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-09 10:38:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:38:48,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:48,063 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:38:48,063 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:38:48,063 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:38:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-09 10:38:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:38:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-09 10:38:48,067 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-09 10:38:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:48,067 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-09 10:38:48,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-09 10:38:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:48,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:48,068 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:48,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-09 10:38:48,277 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-09 10:38:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:48,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690198134] [2020-10-09 10:38:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:48,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690198134] [2020-10-09 10:38:48,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609576288] [2020-10-09 10:38:48,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:48,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:48,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:48,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:48,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957922920] [2020-10-09 10:38:48,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:48,754 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-09 10:38:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:49,164 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-09 10:38:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:49,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:49,166 INFO L225 Difference]: With dead ends: 223 [2020-10-09 10:38:49,166 INFO L226 Difference]: Without dead ends: 221 [2020-10-09 10:38:49,166 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-09 10:38:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-09 10:38:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:38:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-09 10:38:49,172 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-09 10:38:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:49,172 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-09 10:38:49,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-09 10:38:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:49,173 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:49,173 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:49,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-09 10:38:49,374 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-09 10:38:49,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:49,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917680623] [2020-10-09 10:38:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917680623] [2020-10-09 10:38:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724729260] [2020-10-09 10:38:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:49,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:49,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:49,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:49,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298661760] [2020-10-09 10:38:49,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:49,720 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-09 10:38:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:50,057 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-09 10:38:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:50,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:50,058 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:38:50,059 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:38:50,059 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:38:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:38:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-09 10:38:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:38:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-09 10:38:50,062 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-09 10:38:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:50,062 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-09 10:38:50,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-09 10:38:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:50,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:50,063 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:50,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:50,263 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-09 10:38:50,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:50,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208289277] [2020-10-09 10:38:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208289277] [2020-10-09 10:38:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077090723] [2020-10-09 10:38:50,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:50,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:50,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50918382] [2020-10-09 10:38:50,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:50,651 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-09 10:38:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:50,987 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-09 10:38:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:38:50,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:50,988 INFO L225 Difference]: With dead ends: 214 [2020-10-09 10:38:50,988 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:38:50,988 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:38:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-09 10:38:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:38:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-09 10:38:50,991 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-09 10:38:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:50,992 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-09 10:38:50,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-09 10:38:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:50,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:50,992 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:51,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:51,193 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-09 10:38:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131134587] [2020-10-09 10:38:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131134587] [2020-10-09 10:38:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584290726] [2020-10-09 10:38:51,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:51,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:38:51,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:51,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:51,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294342072] [2020-10-09 10:38:51,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:51,588 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-09 10:38:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:51,828 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-09 10:38:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:38:51,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:51,829 INFO L225 Difference]: With dead ends: 203 [2020-10-09 10:38:51,830 INFO L226 Difference]: Without dead ends: 201 [2020-10-09 10:38:51,830 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:38:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-09 10:38:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-09 10:38:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:38:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-09 10:38:51,833 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-09 10:38:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:51,833 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-09 10:38:51,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-09 10:38:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:51,833 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:51,833 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:52,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-09 10:38:52,034 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-09 10:38:52,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:52,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437018480] [2020-10-09 10:38:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437018480] [2020-10-09 10:38:52,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864548037] [2020-10-09 10:38:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:52,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:38:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:52,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:52,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:52,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:52,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071256355] [2020-10-09 10:38:52,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:52,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:52,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:52,456 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-09 10:38:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:52,544 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-09 10:38:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:38:52,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:52,546 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:38:52,546 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:38:52,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:38:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:38:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-09 10:38:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:38:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-09 10:38:52,550 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-09 10:38:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:52,551 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-09 10:38:52,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-09 10:38:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:52,551 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:52,551 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:52,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:52,752 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-09 10:38:52,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:52,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431703635] [2020-10-09 10:38:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431703635] [2020-10-09 10:38:52,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660984190] [2020-10-09 10:38:52,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:52,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:38:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:53,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:53,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:53,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100943505] [2020-10-09 10:38:53,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:53,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:53,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:53,202 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-09 10:38:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:53,483 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-09 10:38:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:53,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:53,484 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:38:53,484 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:38:53,484 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:38:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:38:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-09 10:38:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:38:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-09 10:38:53,488 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-09 10:38:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:53,488 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-09 10:38:53,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-09 10:38:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:53,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:53,489 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:53,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:53,698 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-09 10:38:53,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:53,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435085419] [2020-10-09 10:38:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:53,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435085419] [2020-10-09 10:38:53,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933884251] [2020-10-09 10:38:53,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:53,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:38:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:54,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:54,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:54,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209117088] [2020-10-09 10:38:54,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:54,136 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-09 10:38:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:54,508 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-09 10:38:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:38:54,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:54,510 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:38:54,510 INFO L226 Difference]: Without dead ends: 225 [2020-10-09 10:38:54,510 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:38:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-09 10:38:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-09 10:38:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:38:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-09 10:38:54,514 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-09 10:38:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:54,514 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-09 10:38:54,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-09 10:38:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:54,515 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:54,515 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:54,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:54,719 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-09 10:38:54,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:54,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659560784] [2020-10-09 10:38:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:54,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659560784] [2020-10-09 10:38:54,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134606478] [2020-10-09 10:38:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:54,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:38:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:38:54,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:55,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:55,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272397801] [2020-10-09 10:38:55,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:55,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:38:55,142 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-09 10:38:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:38:55,572 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-09 10:38:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:38:55,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:38:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:38:55,573 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:38:55,574 INFO L226 Difference]: Without dead ends: 225 [2020-10-09 10:38:55,574 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:38:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-09 10:38:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-09 10:38:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:38:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-09 10:38:55,577 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-09 10:38:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:38:55,577 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-09 10:38:55,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:38:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-09 10:38:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:38:55,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:38:55,578 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:38:55,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-09 10:38:55,781 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:38:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:38:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-09 10:38:55,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:38:55,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599116460] [2020-10-09 10:38:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:38:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:55,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599116460] [2020-10-09 10:38:55,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883594784] [2020-10-09 10:38:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:38:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:38:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:38:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:38:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:38:59,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:38:59,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:38:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751453293] [2020-10-09 10:38:59,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:38:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:38:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:38:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:38:59,611 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-09 10:39:03,848 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:39:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:04,204 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-09 10:39:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:04,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:04,205 INFO L225 Difference]: With dead ends: 237 [2020-10-09 10:39:04,205 INFO L226 Difference]: Without dead ends: 235 [2020-10-09 10:39:04,206 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-09 10:39:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-09 10:39:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-09 10:39:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:39:04,217 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:39:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:04,217 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:39:04,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:39:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:04,218 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:04,218 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:04,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-09 10:39:04,419 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-09 10:39:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:04,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961935176] [2020-10-09 10:39:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961935176] [2020-10-09 10:39:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341430297] [2020-10-09 10:39:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:04,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:04,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:04,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:04,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:04,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976249200] [2020-10-09 10:39:04,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:04,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:04,838 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:39:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:05,303 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-09 10:39:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:05,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:05,304 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:39:05,304 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:39:05,305 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:39:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:39:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-09 10:39:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:39:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-09 10:39:05,309 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-09 10:39:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:05,309 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-09 10:39:05,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-09 10:39:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:05,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:05,313 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:05,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-09 10:39:05,518 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-09 10:39:05,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:05,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654021802] [2020-10-09 10:39:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654021802] [2020-10-09 10:39:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054240626] [2020-10-09 10:39:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:05,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:05,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957776228] [2020-10-09 10:39:05,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:05,879 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-09 10:39:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:06,349 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-09 10:39:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:06,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:06,350 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:39:06,351 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:39:06,351 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:39:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:39:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-09 10:39:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:39:06,354 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:39:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:06,354 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:39:06,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:39:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:06,355 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:06,355 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:06,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-09 10:39:06,556 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-09 10:39:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:06,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501878089] [2020-10-09 10:39:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:06,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501878089] [2020-10-09 10:39:06,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924615313] [2020-10-09 10:39:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:06,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:06,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:06,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:06,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393403764] [2020-10-09 10:39:06,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:06,946 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:39:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:07,663 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-09 10:39:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:07,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:07,665 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:39:07,665 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:39:07,665 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:39:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:39:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-09 10:39:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:39:07,671 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:39:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:07,671 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:39:07,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:39:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:07,672 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:07,672 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:07,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-09 10:39:07,883 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-09 10:39:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:07,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188520526] [2020-10-09 10:39:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188520526] [2020-10-09 10:39:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568850523] [2020-10-09 10:39:08,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:08,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:08,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:08,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:08,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:08,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990203015] [2020-10-09 10:39:08,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:08,241 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:39:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:08,652 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-09 10:39:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:08,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:08,654 INFO L225 Difference]: With dead ends: 234 [2020-10-09 10:39:08,654 INFO L226 Difference]: Without dead ends: 232 [2020-10-09 10:39:08,654 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-09 10:39:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-09 10:39:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:39:08,657 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:39:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:08,657 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:39:08,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:39:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:08,658 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:08,658 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:08,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-09 10:39:08,867 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-09 10:39:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:08,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247840520] [2020-10-09 10:39:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:08,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247840520] [2020-10-09 10:39:08,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480507196] [2020-10-09 10:39:08,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:09,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:09,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:09,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146685519] [2020-10-09 10:39:09,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:09,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:09,219 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:39:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:09,709 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-09 10:39:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:09,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:09,711 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:39:09,712 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:39:09,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:39:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-09 10:39:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:39:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-09 10:39:09,717 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-09 10:39:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:09,717 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-09 10:39:09,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-09 10:39:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:09,718 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:09,718 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:09,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:09,919 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-09 10:39:09,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:09,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175195320] [2020-10-09 10:39:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175195320] [2020-10-09 10:39:10,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313082035] [2020-10-09 10:39:10,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:10,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:10,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:10,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424913238] [2020-10-09 10:39:10,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:10,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:10,431 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-09 10:39:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:10,559 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-09 10:39:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:39:10,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:10,561 INFO L225 Difference]: With dead ends: 208 [2020-10-09 10:39:10,561 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:39:10,561 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:39:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:39:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-09 10:39:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:39:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-09 10:39:10,564 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-09 10:39:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:10,564 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-09 10:39:10,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-09 10:39:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:10,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:10,565 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:10,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:10,774 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-09 10:39:10,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859147653] [2020-10-09 10:39:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:10,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859147653] [2020-10-09 10:39:10,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723416502] [2020-10-09 10:39:10,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:11,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:11,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:11,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:11,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196051240] [2020-10-09 10:39:11,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:11,233 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-09 10:39:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:11,543 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-09 10:39:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:11,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:11,545 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:39:11,545 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:39:11,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:39:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-09 10:39:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-09 10:39:11,548 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-09 10:39:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:11,549 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-09 10:39:11,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-09 10:39:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:11,549 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:11,549 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:11,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:11,750 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:11,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-09 10:39:11,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:11,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600858308] [2020-10-09 10:39:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:11,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600858308] [2020-10-09 10:39:11,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376661712] [2020-10-09 10:39:11,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:11,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:11,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:12,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656156300] [2020-10-09 10:39:12,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:12,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:12,146 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:12,532 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-09 10:39:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:12,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:12,533 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:39:12,533 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:39:12,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:39:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-09 10:39:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:39:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-09 10:39:12,537 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-09 10:39:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:12,538 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-09 10:39:12,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-09 10:39:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:12,538 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:12,538 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:12,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:12,739 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-09 10:39:12,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:12,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528224741] [2020-10-09 10:39:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:12,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528224741] [2020-10-09 10:39:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411148815] [2020-10-09 10:39:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:12,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:13,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:13,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:13,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128563543] [2020-10-09 10:39:13,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:13,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:13,142 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-09 10:39:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:13,641 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-09 10:39:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:13,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:13,642 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:39:13,642 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:39:13,643 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:39:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-09 10:39:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-09 10:39:13,647 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-09 10:39:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:13,647 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-09 10:39:13,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-09 10:39:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:13,648 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:13,648 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:13,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:13,856 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-09 10:39:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:13,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126476426] [2020-10-09 10:39:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:13,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126476426] [2020-10-09 10:39:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266449797] [2020-10-09 10:39:13,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:14,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:17,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:17,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:17,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245160202] [2020-10-09 10:39:17,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:17,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:17,817 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:22,104 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:39:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:22,429 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-09 10:39:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:22,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:22,430 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:39:22,430 INFO L226 Difference]: Without dead ends: 239 [2020-10-09 10:39:22,430 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:39:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-09 10:39:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-09 10:39:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-09 10:39:22,434 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-09 10:39:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:22,434 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-09 10:39:22,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-09 10:39:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:22,435 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:22,435 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:22,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:22,635 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-09 10:39:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:22,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299534501] [2020-10-09 10:39:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:22,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299534501] [2020-10-09 10:39:22,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634608222] [2020-10-09 10:39:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:22,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:23,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:23,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:23,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027400835] [2020-10-09 10:39:23,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:23,037 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-09 10:39:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:23,553 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-09 10:39:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:23,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:23,555 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:39:23,555 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:39:23,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:39:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-09 10:39:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:39:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-09 10:39:23,558 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-09 10:39:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:23,558 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-09 10:39:23,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-09 10:39:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:23,559 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:23,559 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:23,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-09 10:39:23,759 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:23,760 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-09 10:39:23,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:23,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143723230] [2020-10-09 10:39:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143723230] [2020-10-09 10:39:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427163080] [2020-10-09 10:39:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:24,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:24,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68273372] [2020-10-09 10:39:24,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:24,110 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-09 10:39:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:24,259 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-09 10:39:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:24,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:24,261 INFO L225 Difference]: With dead ends: 204 [2020-10-09 10:39:24,261 INFO L226 Difference]: Without dead ends: 202 [2020-10-09 10:39:24,261 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:39:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-09 10:39:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-09 10:39:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:39:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-09 10:39:24,264 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-09 10:39:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:24,264 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-09 10:39:24,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-09 10:39:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:24,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:24,265 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:24,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:24,466 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-09 10:39:24,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:24,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364967713] [2020-10-09 10:39:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364967713] [2020-10-09 10:39:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364877189] [2020-10-09 10:39:24,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:24,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:24,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:24,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244008968] [2020-10-09 10:39:24,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:24,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:24,811 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-09 10:39:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:25,135 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-09 10:39:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:25,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:25,136 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:39:25,136 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:39:25,137 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:39:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-09 10:39:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:39:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-09 10:39:25,140 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-09 10:39:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:25,140 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-09 10:39:25,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-09 10:39:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:25,140 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:25,140 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:25,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-09 10:39:25,341 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-09 10:39:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:25,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100275672] [2020-10-09 10:39:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:25,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100275672] [2020-10-09 10:39:25,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712347762] [2020-10-09 10:39:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:25,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:25,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:25,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:25,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076770565] [2020-10-09 10:39:25,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:25,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:25,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:25,752 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-09 10:39:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:26,280 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-09 10:39:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:26,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:26,281 INFO L225 Difference]: With dead ends: 231 [2020-10-09 10:39:26,281 INFO L226 Difference]: Without dead ends: 229 [2020-10-09 10:39:26,282 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:39:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-09 10:39:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-09 10:39:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:39:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-09 10:39:26,285 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-09 10:39:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-09 10:39:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-09 10:39:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:26,286 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:26,286 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:26,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:26,492 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-09 10:39:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:26,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462474873] [2020-10-09 10:39:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:26,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462474873] [2020-10-09 10:39:26,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079579003] [2020-10-09 10:39:26,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:26,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:26,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:26,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:26,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764364331] [2020-10-09 10:39:26,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:26,834 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-09 10:39:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:27,029 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-09 10:39:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:39:27,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:27,030 INFO L225 Difference]: With dead ends: 200 [2020-10-09 10:39:27,030 INFO L226 Difference]: Without dead ends: 198 [2020-10-09 10:39:27,030 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:39:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-09 10:39:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-09 10:39:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-09 10:39:27,033 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-09 10:39:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:27,034 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-09 10:39:27,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-09 10:39:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:27,034 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:27,034 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:27,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:27,237 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-09 10:39:27,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:27,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104784342] [2020-10-09 10:39:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104784342] [2020-10-09 10:39:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080971354] [2020-10-09 10:39:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:27,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:27,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:27,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:27,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688761243] [2020-10-09 10:39:27,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:27,583 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-09 10:39:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:27,953 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-09 10:39:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:27,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:27,954 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:39:27,954 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:39:27,955 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:39:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:39:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-09 10:39:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:39:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-09 10:39:27,958 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-09 10:39:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:27,958 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-09 10:39:27,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-09 10:39:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:27,958 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:27,958 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:28,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-09 10:39:28,168 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-09 10:39:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:28,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678158392] [2020-10-09 10:39:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:28,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678158392] [2020-10-09 10:39:28,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701501560] [2020-10-09 10:39:28,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:28,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:28,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:28,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:28,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114918147] [2020-10-09 10:39:28,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:28,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:28,499 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-10-09 10:39:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:28,726 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-09 10:39:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:28,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:28,727 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:39:28,727 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:39:28,728 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:39:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:39:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-09 10:39:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:39:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:39:28,731 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:39:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:28,731 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:39:28,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:39:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:28,732 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:28,732 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:28,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:28,932 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-09 10:39:28,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:28,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484066321] [2020-10-09 10:39:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:29,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484066321] [2020-10-09 10:39:29,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526395455] [2020-10-09 10:39:29,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:29,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:29,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:29,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:29,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146004302] [2020-10-09 10:39:29,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:29,293 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:29,816 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-09 10:39:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:29,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:29,817 INFO L225 Difference]: With dead ends: 226 [2020-10-09 10:39:29,817 INFO L226 Difference]: Without dead ends: 221 [2020-10-09 10:39:29,817 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:39:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-09 10:39:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-09 10:39:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:39:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-09 10:39:29,821 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-09 10:39:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:29,821 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-09 10:39:29,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-09 10:39:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:29,821 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:29,822 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:30,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:30,022 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:30,023 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-09 10:39:30,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:30,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550792506] [2020-10-09 10:39:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:30,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550792506] [2020-10-09 10:39:30,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975145446] [2020-10-09 10:39:30,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:30,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:30,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:30,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:30,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689842482] [2020-10-09 10:39:30,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:30,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:30,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:30,372 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-09 10:39:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:30,802 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-09 10:39:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:30,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:30,803 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:39:30,803 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:39:30,804 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:39:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-09 10:39:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:39:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:39:30,806 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:39:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:30,806 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:39:30,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:39:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:30,807 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:30,807 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:31,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:31,007 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-09 10:39:31,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:31,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389666112] [2020-10-09 10:39:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:31,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389666112] [2020-10-09 10:39:31,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979723576] [2020-10-09 10:39:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:31,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:31,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:31,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:31,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125238569] [2020-10-09 10:39:31,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:31,356 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:32,080 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-09 10:39:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:39:32,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:32,081 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:39:32,081 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:39:32,082 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:39:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:39:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-09 10:39:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:39:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:39:32,085 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:39:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:32,086 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:39:32,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:39:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:32,086 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:32,086 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:32,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:32,287 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-09 10:39:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087045271] [2020-10-09 10:39:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:32,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087045271] [2020-10-09 10:39:32,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638531915] [2020-10-09 10:39:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:32,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:32,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:32,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:32,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:32,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014688864] [2020-10-09 10:39:32,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:32,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:32,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:32,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:32,615 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:33,137 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-09 10:39:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:33,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:33,139 INFO L225 Difference]: With dead ends: 238 [2020-10-09 10:39:33,139 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:39:33,139 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:39:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:39:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-09 10:39:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:39:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-09 10:39:33,143 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-09 10:39:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:33,143 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-09 10:39:33,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-09 10:39:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:33,143 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:33,143 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:33,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,344 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-09 10:39:33,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:33,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215824692] [2020-10-09 10:39:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215824692] [2020-10-09 10:39:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607187576] [2020-10-09 10:39:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:33,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:33,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:33,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:33,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643296693] [2020-10-09 10:39:33,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:33,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:33,750 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-09 10:39:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:34,417 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-09 10:39:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:34,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:34,418 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:39:34,418 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:39:34,419 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:39:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-09 10:39:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:39:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-09 10:39:34,423 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-09 10:39:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:34,423 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-09 10:39:34,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-09 10:39:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:34,424 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:34,424 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:34,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:34,633 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-09 10:39:34,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:34,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847967978] [2020-10-09 10:39:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:34,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847967978] [2020-10-09 10:39:34,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039760241] [2020-10-09 10:39:34,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:34,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:35,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:35,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024983171] [2020-10-09 10:39:35,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:35,004 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-09 10:39:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:35,669 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-09 10:39:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:35,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:35,671 INFO L225 Difference]: With dead ends: 252 [2020-10-09 10:39:35,671 INFO L226 Difference]: Without dead ends: 250 [2020-10-09 10:39:35,671 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:39:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-09 10:39:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-09 10:39:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:39:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:39:35,675 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:39:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:35,675 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:39:35,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:39:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:35,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:35,676 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:35,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-09 10:39:35,876 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-09 10:39:35,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:35,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889361675] [2020-10-09 10:39:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:35,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889361675] [2020-10-09 10:39:35,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668450203] [2020-10-09 10:39:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:36,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:36,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:36,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:36,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549067506] [2020-10-09 10:39:36,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:36,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:36,291 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:37,110 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-09 10:39:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:37,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:37,111 INFO L225 Difference]: With dead ends: 258 [2020-10-09 10:39:37,111 INFO L226 Difference]: Without dead ends: 253 [2020-10-09 10:39:37,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:39:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-09 10:39:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-09 10:39:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:39:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:39:37,114 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:39:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:37,114 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:39:37,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:39:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:37,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:37,115 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-09 10:39:37,324 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-09 10:39:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575638499] [2020-10-09 10:39:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:37,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575638499] [2020-10-09 10:39:37,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547122952] [2020-10-09 10:39:37,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:37,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:39,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:39,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:39,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:39,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182019824] [2020-10-09 10:39:39,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:39,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:39,764 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:39:44,074 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-09 10:39:48,366 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-09 10:39:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:49,060 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-09 10:39:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:39:49,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:49,061 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:39:49,062 INFO L226 Difference]: Without dead ends: 279 [2020-10-09 10:39:49,062 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:39:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-09 10:39:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-09 10:39:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:39:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-09 10:39:49,067 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-09 10:39:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:49,067 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-09 10:39:49,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-09 10:39:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:49,067 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:49,068 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:49,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-09 10:39:49,272 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-09 10:39:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:49,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42032871] [2020-10-09 10:39:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42032871] [2020-10-09 10:39:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799375891] [2020-10-09 10:39:49,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:49,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:49,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:49,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:49,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116024036] [2020-10-09 10:39:49,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:49,700 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-09 10:39:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:50,566 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-09 10:39:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:50,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:50,567 INFO L225 Difference]: With dead ends: 260 [2020-10-09 10:39:50,567 INFO L226 Difference]: Without dead ends: 255 [2020-10-09 10:39:50,568 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:39:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-09 10:39:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-09 10:39:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:39:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-09 10:39:50,571 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-09 10:39:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:50,572 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-09 10:39:50,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-09 10:39:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:50,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:50,572 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:50,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:50,773 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:50,773 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-09 10:39:50,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:50,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697214302] [2020-10-09 10:39:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:50,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697214302] [2020-10-09 10:39:50,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442598101] [2020-10-09 10:39:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:50,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:51,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:51,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847280581] [2020-10-09 10:39:51,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:51,170 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-09 10:39:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:51,675 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-09 10:39:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:39:51,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:51,678 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:39:51,678 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:39:51,678 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:39:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-09 10:39:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:39:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-09 10:39:51,681 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-09 10:39:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:51,681 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-09 10:39:51,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-09 10:39:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:51,682 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:51,682 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:51,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:51,883 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-09 10:39:51,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:51,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132177610] [2020-10-09 10:39:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132177610] [2020-10-09 10:39:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132487923] [2020-10-09 10:39:51,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:52,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:52,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:56,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:56,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702887231] [2020-10-09 10:39:56,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:56,700 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-09 10:40:01,042 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:40:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:07,493 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-09 10:40:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:07,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:07,494 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:40:07,495 INFO L226 Difference]: Without dead ends: 239 [2020-10-09 10:40:07,495 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:40:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-09 10:40:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-09 10:40:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-09 10:40:07,499 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-09 10:40:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:07,499 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-09 10:40:07,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-09 10:40:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:07,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:07,499 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:07,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-09 10:40:07,700 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-09 10:40:07,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:07,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183686019] [2020-10-09 10:40:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183686019] [2020-10-09 10:40:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553238180] [2020-10-09 10:40:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:07,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:07,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:07,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:07,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:08,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:08,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:08,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922053215] [2020-10-09 10:40:08,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:08,116 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-09 10:40:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:08,662 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-09 10:40:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:08,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:08,663 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:40:08,663 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:40:08,663 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:40:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-09 10:40:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-09 10:40:08,666 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-09 10:40:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:08,666 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-09 10:40:08,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-09 10:40:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:08,666 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:08,666 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:08,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:08,867 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-09 10:40:08,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:08,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662025499] [2020-10-09 10:40:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662025499] [2020-10-09 10:40:08,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605469680] [2020-10-09 10:40:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:09,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:09,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:09,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455352592] [2020-10-09 10:40:09,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:09,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:09,285 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-09 10:40:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:10,120 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-09 10:40:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:40:10,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:10,122 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:40:10,122 INFO L226 Difference]: Without dead ends: 252 [2020-10-09 10:40:10,122 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:40:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-09 10:40:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-09 10:40:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-09 10:40:10,126 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-09 10:40:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:10,126 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-09 10:40:10,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-09 10:40:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:10,126 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:10,126 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:10,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-09 10:40:10,327 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-09 10:40:10,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:10,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646067462] [2020-10-09 10:40:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:10,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646067462] [2020-10-09 10:40:10,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277068278] [2020-10-09 10:40:10,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:10,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:10,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:11,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:11,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611325299] [2020-10-09 10:40:11,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:11,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:11,676 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-09 10:40:16,091 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:40:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:30,892 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-09 10:40:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:40:30,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:30,894 INFO L225 Difference]: With dead ends: 264 [2020-10-09 10:40:30,894 INFO L226 Difference]: Without dead ends: 262 [2020-10-09 10:40:30,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-09 10:40:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-09 10:40:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-09 10:40:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:40:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-09 10:40:30,897 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-09 10:40:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:30,898 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-09 10:40:30,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-09 10:40:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:30,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:30,898 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:31,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:31,099 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-09 10:40:31,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:31,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783738453] [2020-10-09 10:40:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:31,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783738453] [2020-10-09 10:40:31,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090963686] [2020-10-09 10:40:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:31,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:31,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:31,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:31,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734373541] [2020-10-09 10:40:31,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:31,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:31,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:31,563 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-09 10:40:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:32,374 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-09 10:40:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:40:32,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:32,375 INFO L225 Difference]: With dead ends: 255 [2020-10-09 10:40:32,376 INFO L226 Difference]: Without dead ends: 253 [2020-10-09 10:40:32,376 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:40:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-09 10:40:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-09 10:40:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:40:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:40:32,379 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:40:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:32,379 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:40:32,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:40:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:32,380 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:32,380 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:32,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:32,581 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-09 10:40:32,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:32,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165790587] [2020-10-09 10:40:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165790587] [2020-10-09 10:40:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199984892] [2020-10-09 10:40:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:32,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:32,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:32,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:33,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:33,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:33,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444040349] [2020-10-09 10:40:33,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:33,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:33,082 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:40:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:34,293 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-09 10:40:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:40:34,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:34,294 INFO L225 Difference]: With dead ends: 256 [2020-10-09 10:40:34,295 INFO L226 Difference]: Without dead ends: 251 [2020-10-09 10:40:34,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:40:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-09 10:40:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-09 10:40:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:40:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:40:34,298 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:40:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:34,299 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:40:34,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:40:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:34,299 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:34,299 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:34,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-09 10:40:34,500 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-09 10:40:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345572984] [2020-10-09 10:40:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:34,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345572984] [2020-10-09 10:40:34,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387788804] [2020-10-09 10:40:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:34,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:35,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:35,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:35,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110340008] [2020-10-09 10:40:35,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:35,130 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:40:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:36,568 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-09 10:40:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:40:36,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:36,570 INFO L225 Difference]: With dead ends: 279 [2020-10-09 10:40:36,571 INFO L226 Difference]: Without dead ends: 274 [2020-10-09 10:40:36,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:40:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-09 10:40:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-09 10:40:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:40:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-09 10:40:36,574 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-09 10:40:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:36,574 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-09 10:40:36,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-09 10:40:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:36,574 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:36,574 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:36,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-09 10:40:36,775 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-09 10:40:36,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:36,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951436128] [2020-10-09 10:40:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951436128] [2020-10-09 10:40:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185577165] [2020-10-09 10:40:36,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:36,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:40:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:39,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:39,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731271314] [2020-10-09 10:40:39,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:40:39,323 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-09 10:40:43,695 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:40:47,958 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:40:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:48,651 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-09 10:40:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:40:48,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:48,653 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:40:48,653 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:40:48,654 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:40:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:40:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-09 10:40:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:40:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:40:48,658 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:40:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:48,658 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:40:48,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:40:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:48,659 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:48,659 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:48,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-09 10:40:48,865 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-09 10:40:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:48,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440101222] [2020-10-09 10:40:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:48,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440101222] [2020-10-09 10:40:48,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851237342] [2020-10-09 10:40:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:49,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:52,258 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_v_~j~0_527_43 Int) (v_~i~0_535 Int) (aux_div_aux_mod_v_~j~0_527_43_92 Int)) (let ((.cse0 (* 2 aux_div_v_~j~0_527_43)) (.cse1 (* 2 aux_div_aux_mod_v_~j~0_527_43_92))) (and (<= (+ .cse0 c_~j~0) (* 2 v_~i~0_535)) (<= c_~j~0 (+ .cse1 v_~i~0_535 2)) (<= aux_div_v_~j~0_527_43 1) (<= v_~i~0_535 (+ .cse0 .cse1 3)) (<= c_~i~0 (+ v_~i~0_535 c_~j~0)) (<= (+ .cse0 .cse1 1) v_~i~0_535) (<= aux_div_aux_mod_v_~j~0_527_43_92 1)))) is different from true [2020-10-09 10:40:52,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:52,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:52,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:52,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:52,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562044408] [2020-10-09 10:40:52,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:52,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-09 10:40:52,327 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:40:52,708 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-09 10:40:56,855 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:41:03,805 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:41:12,775 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-09 10:41:13,126 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-09 10:41:15,489 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-09 10:41:25,089 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-09 10:41:26,358 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-09 10:41:32,233 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-09 10:41:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:34,336 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-10-09 10:41:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:41:34,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:34,338 INFO L225 Difference]: With dead ends: 292 [2020-10-09 10:41:34,338 INFO L226 Difference]: Without dead ends: 287 [2020-10-09 10:41:34,339 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=482, Invalid=1066, Unknown=16, NotChecked=76, Total=1640 [2020-10-09 10:41:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-09 10:41:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-10-09 10:41:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-09 10:41:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-09 10:41:34,343 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-09 10:41:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:34,343 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-09 10:41:34,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-09 10:41:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:34,343 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:34,343 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:34,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-09 10:41:34,544 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-09 10:41:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:34,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649850202] [2020-10-09 10:41:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649850202] [2020-10-09 10:41:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530415826] [2020-10-09 10:41:34,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:34,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:41:34,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:37,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:41:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:37,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:37,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698919709] [2020-10-09 10:41:37,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:37,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:41:37,134 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-09 10:41:38,631 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-09 10:41:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:39,172 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-09 10:41:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:41:39,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:39,174 INFO L225 Difference]: With dead ends: 292 [2020-10-09 10:41:39,174 INFO L226 Difference]: Without dead ends: 284 [2020-10-09 10:41:39,175 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-09 10:41:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-09 10:41:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-09 10:41:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:41:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-09 10:41:39,178 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-09 10:41:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-09 10:41:39,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-09 10:41:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:39,179 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:39,179 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-09 10:41:39,380 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-09 10:41:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:39,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167931010] [2020-10-09 10:41:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167931010] [2020-10-09 10:41:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337551892] [2020-10-09 10:41:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:39,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:41:39,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:39,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:39,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447396095] [2020-10-09 10:41:39,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:39,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:39,863 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-09 10:41:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:40,451 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-09 10:41:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:41:40,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:40,453 INFO L225 Difference]: With dead ends: 231 [2020-10-09 10:41:40,453 INFO L226 Difference]: Without dead ends: 229 [2020-10-09 10:41:40,454 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:41:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-09 10:41:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-09 10:41:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:41:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-09 10:41:40,456 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-09 10:41:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:40,457 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-09 10:41:40,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-09 10:41:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:40,457 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:40,457 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:40,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-09 10:41:40,658 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-09 10:41:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:40,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573662333] [2020-10-09 10:41:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:40,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573662333] [2020-10-09 10:41:40,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902474745] [2020-10-09 10:41:40,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:40,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:41:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:41,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:41,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464038827] [2020-10-09 10:41:41,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:41,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:41,188 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-09 10:41:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:42,206 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-09 10:41:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:41:42,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:42,209 INFO L225 Difference]: With dead ends: 250 [2020-10-09 10:41:42,209 INFO L226 Difference]: Without dead ends: 248 [2020-10-09 10:41:42,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:41:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-09 10:41:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-09 10:41:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:41:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-09 10:41:42,212 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-09 10:41:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:42,213 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-09 10:41:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-09 10:41:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:42,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:42,213 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:42,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:42,414 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-09 10:41:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:42,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934238119] [2020-10-09 10:41:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934238119] [2020-10-09 10:41:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556357666] [2020-10-09 10:41:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:42,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:41:42,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:42,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:41:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:42,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:42,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:42,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347104475] [2020-10-09 10:41:42,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:42,904 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-09 10:41:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:44,517 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-09 10:41:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:41:44,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:44,518 INFO L225 Difference]: With dead ends: 288 [2020-10-09 10:41:44,518 INFO L226 Difference]: Without dead ends: 283 [2020-10-09 10:41:44,519 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:41:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-09 10:41:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-09 10:41:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:41:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-09 10:41:44,522 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-09 10:41:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-09 10:41:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-09 10:41:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:44,523 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:44,523 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:44,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-09 10:41:44,724 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:44,724 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-09 10:41:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064433231] [2020-10-09 10:41:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:44,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064433231] [2020-10-09 10:41:44,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677417577] [2020-10-09 10:41:44,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:44,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:41:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:45,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:45,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:45,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272057636] [2020-10-09 10:41:45,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:45,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:45,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:45,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:45,181 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-09 10:41:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:45,775 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-09 10:41:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:41:45,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:45,776 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:41:45,776 INFO L226 Difference]: Without dead ends: 234 [2020-10-09 10:41:45,777 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:41:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-09 10:41:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-09 10:41:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:41:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:41:45,780 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:41:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:41:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:41:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:45,781 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:45,781 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:45,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:45,982 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-09 10:41:45,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:45,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376835638] [2020-10-09 10:41:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376835638] [2020-10-09 10:41:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237487858] [2020-10-09 10:41:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:46,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:46,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:46,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:46,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235588664] [2020-10-09 10:41:46,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:46,432 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:41:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:47,111 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-09 10:41:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:41:47,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:47,113 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:41:47,114 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:41:47,114 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:41:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:41:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-09 10:41:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:41:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:41:47,118 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:41:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:47,118 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:41:47,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:41:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:47,118 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:47,118 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:47,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:47,319 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-09 10:41:47,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:47,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995933316] [2020-10-09 10:41:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:47,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995933316] [2020-10-09 10:41:47,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553317261] [2020-10-09 10:41:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:47,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:41:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:47,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:47,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:47,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151057194] [2020-10-09 10:41:47,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:47,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:47,775 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:41:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:48,299 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-09 10:41:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:41:48,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:48,301 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:41:48,301 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:41:48,301 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:41:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:41:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-09 10:41:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:41:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:41:48,304 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:41:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:48,304 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:41:48,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:41:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:48,305 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:48,305 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:48,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:48,506 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-09 10:41:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:48,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483763790] [2020-10-09 10:41:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483763790] [2020-10-09 10:41:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177303420] [2020-10-09 10:41:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:48,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:41:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:48,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:48,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53776683] [2020-10-09 10:41:48,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:48,972 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:41:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:49,446 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-09 10:41:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:41:49,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:49,447 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:41:49,448 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:41:49,448 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:41:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:41:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-09 10:41:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:41:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-09 10:41:49,451 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-09 10:41:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:49,452 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-09 10:41:49,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-09 10:41:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:49,452 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:49,452 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:49,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-09 10:41:49,653 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-09 10:41:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:49,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14938454] [2020-10-09 10:41:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:49,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14938454] [2020-10-09 10:41:49,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521454386] [2020-10-09 10:41:49,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:49,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:41:49,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:50,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:50,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:50,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451572016] [2020-10-09 10:41:50,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:50,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:50,130 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-09 10:41:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:51,072 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-09 10:41:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:41:51,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:51,074 INFO L225 Difference]: With dead ends: 261 [2020-10-09 10:41:51,074 INFO L226 Difference]: Without dead ends: 259 [2020-10-09 10:41:51,075 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:41:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-09 10:41:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-09 10:41:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:41:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-09 10:41:51,078 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-09 10:41:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-09 10:41:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-09 10:41:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:51,078 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:51,078 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:51,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:51,279 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-09 10:41:51,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:51,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182233267] [2020-10-09 10:41:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182233267] [2020-10-09 10:41:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143879097] [2020-10-09 10:41:51,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:51,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:41:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:51,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:51,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991196193] [2020-10-09 10:41:51,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:51,699 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-09 10:41:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:52,627 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-09 10:41:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:41:52,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:52,629 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:41:52,629 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:41:52,630 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:41:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:41:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-09 10:41:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:41:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-09 10:41:52,633 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-09 10:41:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:52,634 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-09 10:41:52,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-09 10:41:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:52,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:52,635 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:52,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-09 10:41:52,843 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-09 10:41:52,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:52,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240354498] [2020-10-09 10:41:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:53,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240354498] [2020-10-09 10:41:53,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327722434] [2020-10-09 10:41:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:53,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:41:53,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:53,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:53,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:53,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133038113] [2020-10-09 10:41:53,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:53,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:53,359 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-09 10:41:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:54,132 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-09 10:41:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:41:54,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:54,134 INFO L225 Difference]: With dead ends: 253 [2020-10-09 10:41:54,134 INFO L226 Difference]: Without dead ends: 251 [2020-10-09 10:41:54,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:41:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-09 10:41:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-09 10:41:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:41:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-09 10:41:54,139 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-09 10:41:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:54,139 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-09 10:41:54,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-09 10:41:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:54,139 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:54,139 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-09 10:41:54,340 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-09 10:41:54,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:54,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863229733] [2020-10-09 10:41:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:54,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863229733] [2020-10-09 10:41:54,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180283202] [2020-10-09 10:41:54,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:54,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811689128] [2020-10-09 10:41:54,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:54,799 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-09 10:41:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:55,841 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-09 10:41:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:41:55,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:55,844 INFO L225 Difference]: With dead ends: 268 [2020-10-09 10:41:55,844 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 10:41:55,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:41:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 10:41:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-09 10:41:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:41:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:41:55,848 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:41:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:55,848 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:41:55,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:41:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:55,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:55,848 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:56,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:56,049 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-09 10:41:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:56,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301615571] [2020-10-09 10:41:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:56,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301615571] [2020-10-09 10:41:56,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509923530] [2020-10-09 10:41:56,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:56,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:41:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:56,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:56,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326880307] [2020-10-09 10:41:56,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:56,523 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:41:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:57,623 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-09 10:41:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 10:41:57,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:57,625 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:41:57,625 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:41:57,626 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:41:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:41:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-09 10:41:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:41:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-09 10:41:57,630 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-09 10:41:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:57,631 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-09 10:41:57,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-09 10:41:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:57,631 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:57,632 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:57,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-09 10:41:57,837 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-09 10:41:57,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:57,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51278695] [2020-10-09 10:41:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51278695] [2020-10-09 10:41:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567221300] [2020-10-09 10:41:57,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:58,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:41:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:58,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:58,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:58,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997202860] [2020-10-09 10:41:58,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:58,284 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-09 10:41:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:41:59,308 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-09 10:41:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:41:59,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:41:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:41:59,310 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:41:59,310 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:41:59,311 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:41:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:41:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-09 10:41:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:41:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:41:59,314 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:41:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:41:59,314 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:41:59,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:41:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:41:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:41:59,315 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:41:59,315 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:41:59,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-09 10:41:59,516 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:41:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:41:59,516 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-09 10:41:59,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:41:59,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37575912] [2020-10-09 10:41:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:41:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:41:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:59,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37575912] [2020-10-09 10:41:59,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984342423] [2020-10-09 10:41:59,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:41:59,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:41:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:41:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:41:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:41:59,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:41:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:59,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:59,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:41:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518025327] [2020-10-09 10:41:59,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:41:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:41:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:41:59,933 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:42:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:00,953 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-09 10:42:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:00,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:00,955 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:42:00,955 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:42:00,955 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:42:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:42:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-09 10:42:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:42:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:42:00,958 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:42:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:00,958 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:42:00,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:42:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:00,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:00,959 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:01,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,159 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-09 10:42:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:01,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135388115] [2020-10-09 10:42:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135388115] [2020-10-09 10:42:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847977784] [2020-10-09 10:42:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:01,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:01,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:01,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:01,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:01,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979576079] [2020-10-09 10:42:01,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:01,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:01,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:01,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:01,640 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:42:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:03,052 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-09 10:42:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:42:03,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:03,054 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:42:03,054 INFO L226 Difference]: Without dead ends: 282 [2020-10-09 10:42:03,054 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:42:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-09 10:42:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-09 10:42:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:42:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-09 10:42:03,058 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-09 10:42:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:03,058 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-09 10:42:03,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-09 10:42:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:03,058 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:03,058 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:03,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:03,259 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-09 10:42:03,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:03,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792944556] [2020-10-09 10:42:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:03,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792944556] [2020-10-09 10:42:03,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992645428] [2020-10-09 10:42:03,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:03,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:42:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:03,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:03,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:03,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813664489] [2020-10-09 10:42:03,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:03,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:03,912 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-09 10:42:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:05,531 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-09 10:42:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:42:05,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:05,534 INFO L225 Difference]: With dead ends: 284 [2020-10-09 10:42:05,534 INFO L226 Difference]: Without dead ends: 282 [2020-10-09 10:42:05,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 10:42:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-09 10:42:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-09 10:42:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:42:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:42:05,538 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:42:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:05,538 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:42:05,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:42:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:05,538 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:05,538 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:05,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:05,739 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-09 10:42:05,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:05,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058681495] [2020-10-09 10:42:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058681495] [2020-10-09 10:42:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649653935] [2020-10-09 10:42:05,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:06,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:06,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:06,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:06,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654825472] [2020-10-09 10:42:06,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:06,269 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:42:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:07,744 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-09 10:42:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:42:07,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:07,746 INFO L225 Difference]: With dead ends: 289 [2020-10-09 10:42:07,746 INFO L226 Difference]: Without dead ends: 284 [2020-10-09 10:42:07,747 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:42:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-09 10:42:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-09 10:42:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-09 10:42:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-09 10:42:07,750 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-09 10:42:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:07,750 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-09 10:42:07,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-09 10:42:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:07,751 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:07,751 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:07,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:07,952 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-09 10:42:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:07,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531376493] [2020-10-09 10:42:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:08,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531376493] [2020-10-09 10:42:08,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533881369] [2020-10-09 10:42:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:08,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:08,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:08,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:08,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:08,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:08,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240173745] [2020-10-09 10:42:08,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:08,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:08,430 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-09 10:42:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:10,205 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-09 10:42:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:42:10,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:10,207 INFO L225 Difference]: With dead ends: 312 [2020-10-09 10:42:10,207 INFO L226 Difference]: Without dead ends: 304 [2020-10-09 10:42:10,208 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:42:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-09 10:42:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-09 10:42:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:42:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-09 10:42:10,211 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-09 10:42:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-09 10:42:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-09 10:42:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:10,212 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:10,212 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:10,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:10,412 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:10,413 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-09 10:42:10,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:10,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960927656] [2020-10-09 10:42:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960927656] [2020-10-09 10:42:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206711857] [2020-10-09 10:42:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:10,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:42:10,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:10,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:10,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420928925] [2020-10-09 10:42:10,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:10,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:10,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:10,881 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-09 10:42:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:11,780 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-09 10:42:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:11,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:11,781 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:42:11,781 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:42:11,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:42:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:42:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-09 10:42:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:42:11,785 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:42:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:11,785 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:42:11,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:42:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:11,786 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:11,786 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:11,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-09 10:42:11,992 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-09 10:42:11,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:11,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046146320] [2020-10-09 10:42:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046146320] [2020-10-09 10:42:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051392574] [2020-10-09 10:42:12,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:12,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:12,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:12,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:12,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027407612] [2020-10-09 10:42:12,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:12,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:12,467 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:42:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:13,578 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-09 10:42:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:13,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:13,580 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:42:13,580 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:42:13,580 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:42:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:42:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-09 10:42:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:42:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:42:13,583 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:42:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:13,584 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:42:13,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:42:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:13,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:13,584 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:13,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-09 10:42:13,786 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-09 10:42:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:13,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695348793] [2020-10-09 10:42:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:13,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695348793] [2020-10-09 10:42:13,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991010049] [2020-10-09 10:42:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:14,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:14,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:14,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:14,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:14,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:14,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501393702] [2020-10-09 10:42:14,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:14,242 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:42:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:15,570 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-09 10:42:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:42:15,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:15,573 INFO L225 Difference]: With dead ends: 296 [2020-10-09 10:42:15,573 INFO L226 Difference]: Without dead ends: 288 [2020-10-09 10:42:15,574 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:42:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-09 10:42:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-09 10:42:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:42:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-09 10:42:15,576 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-09 10:42:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:15,576 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-09 10:42:15,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-09 10:42:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:15,577 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:15,577 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:15,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-09 10:42:15,778 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-09 10:42:15,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:15,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446239462] [2020-10-09 10:42:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:15,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446239462] [2020-10-09 10:42:15,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272540847] [2020-10-09 10:42:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:15,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:42:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:16,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:16,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:16,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:16,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882849585] [2020-10-09 10:42:16,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:16,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:16,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:16,262 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-09 10:42:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:17,823 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-09 10:42:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:42:17,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:17,825 INFO L225 Difference]: With dead ends: 298 [2020-10-09 10:42:17,826 INFO L226 Difference]: Without dead ends: 290 [2020-10-09 10:42:17,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:42:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-09 10:42:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-09 10:42:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:42:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-09 10:42:17,830 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-09 10:42:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:17,830 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-09 10:42:17,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-09 10:42:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:17,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:17,831 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:18,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-09 10:42:18,032 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-09 10:42:18,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:18,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467048032] [2020-10-09 10:42:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467048032] [2020-10-09 10:42:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921811242] [2020-10-09 10:42:18,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:18,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:18,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:18,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:18,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:18,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523480635] [2020-10-09 10:42:18,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:18,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:18,549 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-09 10:42:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:20,221 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-09 10:42:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:42:20,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:20,224 INFO L225 Difference]: With dead ends: 291 [2020-10-09 10:42:20,224 INFO L226 Difference]: Without dead ends: 283 [2020-10-09 10:42:20,225 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:42:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-09 10:42:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-09 10:42:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:42:20,228 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:42:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:20,228 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:42:20,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:42:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:20,229 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:20,229 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:20,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-09 10:42:20,429 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-09 10:42:20,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:20,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484808960] [2020-10-09 10:42:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:20,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484808960] [2020-10-09 10:42:20,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691940202] [2020-10-09 10:42:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:20,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:20,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:20,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:20,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:20,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335033150] [2020-10-09 10:42:20,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:20,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:20,910 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:42:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:22,062 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-09 10:42:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:42:22,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:22,064 INFO L225 Difference]: With dead ends: 265 [2020-10-09 10:42:22,064 INFO L226 Difference]: Without dead ends: 263 [2020-10-09 10:42:22,064 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:42:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-09 10:42:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-09 10:42:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:42:22,068 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:42:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:22,068 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:42:22,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:42:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:22,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:22,068 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:22,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:22,269 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:22,270 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-09 10:42:22,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:22,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010129434] [2020-10-09 10:42:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010129434] [2020-10-09 10:42:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795516944] [2020-10-09 10:42:22,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:22,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:42:22,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:22,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:22,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:22,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715498127] [2020-10-09 10:42:22,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:22,770 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:42:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:24,152 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-09 10:42:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:42:24,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:24,154 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:42:24,154 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:42:24,155 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:42:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:42:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-09 10:42:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:42:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:42:24,158 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:42:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:24,158 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:42:24,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:42:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:24,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:24,159 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:24,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-09 10:42:24,359 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-09 10:42:24,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:24,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618936212] [2020-10-09 10:42:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618936212] [2020-10-09 10:42:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578611353] [2020-10-09 10:42:24,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:24,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:24,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:24,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:24,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263163450] [2020-10-09 10:42:24,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:24,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:24,872 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:42:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:26,946 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-09 10:42:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:42:26,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:26,949 INFO L225 Difference]: With dead ends: 285 [2020-10-09 10:42:26,949 INFO L226 Difference]: Without dead ends: 280 [2020-10-09 10:42:26,949 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 10:42:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-09 10:42:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-09 10:42:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:42:26,953 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:42:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:26,953 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:42:26,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:42:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:26,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:26,953 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:27,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:27,154 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-09 10:42:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:27,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648551803] [2020-10-09 10:42:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:27,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648551803] [2020-10-09 10:42:27,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358177246] [2020-10-09 10:42:27,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:27,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:31,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:35,906 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-09 10:42:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:35,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:35,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:42:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011522321] [2020-10-09 10:42:35,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:42:35,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:35,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:42:35,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-09 10:42:35,910 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-09 10:42:40,125 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-09 10:42:44,779 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:42:48,972 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-09 10:42:53,406 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-09 10:42:55,695 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:43:04,517 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-09 10:43:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:43,736 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-09 10:43:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:43:43,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:43:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:43,740 INFO L225 Difference]: With dead ends: 302 [2020-10-09 10:43:43,740 INFO L226 Difference]: Without dead ends: 297 [2020-10-09 10:43:43,740 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-09 10:43:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-09 10:43:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-09 10:43:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:43:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-09 10:43:43,744 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-09 10:43:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:43,744 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-09 10:43:43,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:43:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-09 10:43:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:43,744 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:43,745 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:43,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:43,945 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-09 10:43:43,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:43,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704191195] [2020-10-09 10:43:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:44,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704191195] [2020-10-09 10:43:44,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046263285] [2020-10-09 10:43:44,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:44,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:44,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:44,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:44,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095858674] [2020-10-09 10:43:44,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:44,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:44,390 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-09 10:43:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:44,940 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-09 10:43:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:44,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:44,943 INFO L225 Difference]: With dead ends: 219 [2020-10-09 10:43:44,943 INFO L226 Difference]: Without dead ends: 217 [2020-10-09 10:43:44,944 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:43:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-09 10:43:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-09 10:43:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:43:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:43:44,947 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:43:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:44,947 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:43:44,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:43:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:44,947 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:44,947 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:45,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:45,148 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-09 10:43:45,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:45,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984549411] [2020-10-09 10:43:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:45,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984549411] [2020-10-09 10:43:45,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14541380] [2020-10-09 10:43:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:45,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:43:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:45,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:45,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454335217] [2020-10-09 10:43:45,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:45,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:45,621 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:43:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:46,331 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-09 10:43:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:43:46,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:46,334 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:43:46,334 INFO L226 Difference]: Without dead ends: 224 [2020-10-09 10:43:46,335 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:43:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-09 10:43:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-09 10:43:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:43:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-09 10:43:46,337 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-09 10:43:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:46,338 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-09 10:43:46,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-09 10:43:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:46,338 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:46,338 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:46,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-09 10:43:46,541 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-09 10:43:46,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:46,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007580859] [2020-10-09 10:43:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:46,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007580859] [2020-10-09 10:43:46,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966111058] [2020-10-09 10:43:46,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:46,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:46,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:47,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:47,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096777022] [2020-10-09 10:43:47,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:47,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:47,029 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-09 10:43:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:47,595 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-09 10:43:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:47,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:47,598 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:43:47,598 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:43:47,599 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:43:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:43:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-09 10:43:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:43:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-09 10:43:47,602 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-09 10:43:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:47,602 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-09 10:43:47,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-09 10:43:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:47,603 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:47,603 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:47,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-09 10:43:47,803 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-09 10:43:47,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:47,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254004196] [2020-10-09 10:43:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254004196] [2020-10-09 10:43:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745101617] [2020-10-09 10:43:47,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:48,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:48,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:48,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:48,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247889943] [2020-10-09 10:43:48,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:48,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:48,318 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-09 10:43:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:48,898 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-09 10:43:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:48,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:48,900 INFO L225 Difference]: With dead ends: 237 [2020-10-09 10:43:48,900 INFO L226 Difference]: Without dead ends: 235 [2020-10-09 10:43:48,901 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:43:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-09 10:43:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-09 10:43:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:43:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-09 10:43:48,904 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-09 10:43:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:48,905 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-09 10:43:48,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-09 10:43:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:48,905 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:48,905 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:49,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-09 10:43:49,107 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-09 10:43:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:49,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21054161] [2020-10-09 10:43:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:49,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21054161] [2020-10-09 10:43:49,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404308472] [2020-10-09 10:43:49,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:49,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:49,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:49,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:49,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:49,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311993710] [2020-10-09 10:43:49,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:49,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:49,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:49,867 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-09 10:43:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:50,768 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-09 10:43:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:43:50,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:50,769 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:43:50,769 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:43:50,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:43:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:43:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-09 10:43:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:43:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-09 10:43:50,773 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-09 10:43:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:50,774 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-09 10:43:50,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-09 10:43:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:50,774 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:50,774 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:50,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-09 10:43:50,975 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-09 10:43:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:50,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575298265] [2020-10-09 10:43:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575298265] [2020-10-09 10:43:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340671268] [2020-10-09 10:43:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:51,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:51,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:51,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:51,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403671063] [2020-10-09 10:43:51,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:51,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:51,525 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-09 10:43:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:52,166 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-09 10:43:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:43:52,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:52,168 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:43:52,168 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:43:52,168 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:43:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:43:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-09 10:43:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:43:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-09 10:43:52,171 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-09 10:43:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:52,171 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-09 10:43:52,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-09 10:43:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:52,172 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:52,172 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:52,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-09 10:43:52,372 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-09 10:43:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:52,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996621705] [2020-10-09 10:43:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:52,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996621705] [2020-10-09 10:43:52,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359757995] [2020-10-09 10:43:52,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:52,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:43:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:52,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:52,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:52,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:52,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657576610] [2020-10-09 10:43:52,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:52,904 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-09 10:43:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:53,518 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-09 10:43:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:53,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:53,520 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:43:53,520 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:43:53,521 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:43:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:43:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-09 10:43:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:43:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-09 10:43:53,524 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-09 10:43:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:53,524 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-09 10:43:53,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-09 10:43:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:53,525 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:53,525 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:53,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-09 10:43:53,726 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-09 10:43:53,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:53,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803521800] [2020-10-09 10:43:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803521800] [2020-10-09 10:43:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634668446] [2020-10-09 10:43:53,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:54,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:54,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729314618] [2020-10-09 10:43:54,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:54,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:54,302 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-09 10:43:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:54,714 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-09 10:43:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:43:54,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:54,717 INFO L225 Difference]: With dead ends: 220 [2020-10-09 10:43:54,717 INFO L226 Difference]: Without dead ends: 218 [2020-10-09 10:43:54,717 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:43:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-09 10:43:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-09 10:43:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:43:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-09 10:43:54,720 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-09 10:43:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:54,720 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-09 10:43:54,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-09 10:43:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:54,721 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:54,721 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:54,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-09 10:43:54,921 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-09 10:43:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:54,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055224323] [2020-10-09 10:43:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055224323] [2020-10-09 10:43:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151133071] [2020-10-09 10:43:55,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:55,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:43:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:55,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:55,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:55,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106420845] [2020-10-09 10:43:55,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:55,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:55,467 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-09 10:43:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:56,015 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-09 10:43:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:56,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:56,016 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:43:56,016 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:43:56,017 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:43:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:43:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-09 10:43:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:43:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-09 10:43:56,020 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-09 10:43:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:56,021 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-09 10:43:56,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-09 10:43:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:56,021 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:56,021 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-09 10:43:56,222 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-09 10:43:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:56,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064980671] [2020-10-09 10:43:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:56,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064980671] [2020-10-09 10:43:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890486155] [2020-10-09 10:43:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:56,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:43:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:56,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:56,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:56,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:56,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:56,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592256810] [2020-10-09 10:43:56,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:56,715 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-09 10:43:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:57,286 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-09 10:43:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:43:57,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:57,297 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:43:57,297 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:43:57,297 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:43:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:43:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-09 10:43:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:43:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-09 10:43:57,300 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-09 10:43:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:57,300 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-09 10:43:57,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-09 10:43:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:57,301 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:57,301 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:57,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:57,502 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-09 10:43:57,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:57,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75533981] [2020-10-09 10:43:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:57,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75533981] [2020-10-09 10:43:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868891231] [2020-10-09 10:43:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:57,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:43:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:58,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:58,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:58,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641368206] [2020-10-09 10:43:58,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:58,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:58,124 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-09 10:43:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:43:59,084 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-09 10:43:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:43:59,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:43:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:43:59,086 INFO L225 Difference]: With dead ends: 256 [2020-10-09 10:43:59,086 INFO L226 Difference]: Without dead ends: 254 [2020-10-09 10:43:59,086 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:43:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-09 10:43:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-09 10:43:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:43:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-09 10:43:59,090 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-09 10:43:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:43:59,090 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-09 10:43:59,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:43:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-09 10:43:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:43:59,091 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:43:59,091 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:43:59,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:59,291 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:43:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:43:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-09 10:43:59,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:43:59,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014165336] [2020-10-09 10:43:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:43:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:43:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:59,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014165336] [2020-10-09 10:43:59,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102725181] [2020-10-09 10:43:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:43:59,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:43:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:43:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:43:59,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:43:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:43:59,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:43:59,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:43:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316819260] [2020-10-09 10:43:59,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:43:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:43:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:43:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:43:59,863 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-09 10:44:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:00,645 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-09 10:44:00,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:44:00,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:00,648 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:44:00,648 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:44:00,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:44:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:44:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-09 10:44:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:44:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-09 10:44:00,650 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-09 10:44:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:00,651 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-09 10:44:00,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-09 10:44:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:00,651 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:00,651 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:00,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:00,852 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-09 10:44:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:00,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210701052] [2020-10-09 10:44:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210701052] [2020-10-09 10:44:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683424895] [2020-10-09 10:44:01,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:01,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:44:01,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:01,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:01,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:01,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718016277] [2020-10-09 10:44:01,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:01,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:01,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:01,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:01,388 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-09 10:44:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:02,215 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-09 10:44:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:44:02,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:02,218 INFO L225 Difference]: With dead ends: 250 [2020-10-09 10:44:02,218 INFO L226 Difference]: Without dead ends: 248 [2020-10-09 10:44:02,219 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:44:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-09 10:44:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-09 10:44:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:44:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-09 10:44:02,222 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-09 10:44:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:02,222 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-09 10:44:02,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-09 10:44:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:02,223 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:02,223 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:02,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-09 10:44:02,423 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-09 10:44:02,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:02,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868122117] [2020-10-09 10:44:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868122117] [2020-10-09 10:44:02,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328692653] [2020-10-09 10:44:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:02,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:02,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942147207] [2020-10-09 10:44:02,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:02,909 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-09 10:44:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:03,600 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-09 10:44:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:44:03,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:03,604 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:44:03,604 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:44:03,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:44:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:44:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-09 10:44:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:44:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-09 10:44:03,607 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-09 10:44:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:03,608 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-09 10:44:03,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-09 10:44:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:03,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:03,608 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:03,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:03,810 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-09 10:44:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:03,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456243170] [2020-10-09 10:44:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456243170] [2020-10-09 10:44:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486017199] [2020-10-09 10:44:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:04,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:44:04,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:04,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:04,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978438685] [2020-10-09 10:44:04,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:04,468 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-09 10:44:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:05,568 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-09 10:44:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:44:05,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:05,572 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:44:05,572 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:44:05,572 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:44:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:44:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-09 10:44:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:44:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-09 10:44:05,576 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-09 10:44:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:05,576 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-09 10:44:05,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-09 10:44:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:05,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:05,576 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:05,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-09 10:44:05,777 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-09 10:44:05,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:05,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991810722] [2020-10-09 10:44:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:05,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991810722] [2020-10-09 10:44:05,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964746112] [2020-10-09 10:44:05,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:44:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:06,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904143339] [2020-10-09 10:44:06,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:06,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:06,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:06,359 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-09 10:44:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:07,275 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-09 10:44:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:44:07,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:07,278 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:44:07,278 INFO L226 Difference]: Without dead ends: 252 [2020-10-09 10:44:07,278 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:44:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-09 10:44:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-09 10:44:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:44:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-09 10:44:07,282 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-09 10:44:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:07,282 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-09 10:44:07,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-09 10:44:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:07,282 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:07,282 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:07,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-09 10:44:07,483 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-09 10:44:07,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:07,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492237540] [2020-10-09 10:44:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:07,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492237540] [2020-10-09 10:44:07,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599221307] [2020-10-09 10:44:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:07,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:44:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:07,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:08,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:08,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030996068] [2020-10-09 10:44:08,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:08,079 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-09 10:44:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:08,913 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-09 10:44:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:44:08,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:08,914 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:44:08,914 INFO L226 Difference]: Without dead ends: 246 [2020-10-09 10:44:08,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:44:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-09 10:44:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-09 10:44:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:44:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:44:08,922 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:44:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:08,923 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:44:08,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:44:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:08,923 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:08,923 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:09,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:09,124 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-09 10:44:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:09,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082470651] [2020-10-09 10:44:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:09,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082470651] [2020-10-09 10:44:09,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845325051] [2020-10-09 10:44:09,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:09,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:44:09,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:09,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:09,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:09,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572315174] [2020-10-09 10:44:09,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:09,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:09,562 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:44:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:10,564 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-09 10:44:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:44:10,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:10,567 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:44:10,567 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:44:10,567 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:44:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:44:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-09 10:44:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:44:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:44:10,571 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:44:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:10,571 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:44:10,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:44:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:10,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:10,572 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:10,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:10,782 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-09 10:44:10,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:10,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739107651] [2020-10-09 10:44:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:10,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739107651] [2020-10-09 10:44:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312856597] [2020-10-09 10:44:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:10,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:44:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:11,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:44:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:11,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:11,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897102538] [2020-10-09 10:44:11,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:11,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:11,225 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:44:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:11,860 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-09 10:44:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:44:11,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:11,863 INFO L225 Difference]: With dead ends: 223 [2020-10-09 10:44:11,863 INFO L226 Difference]: Without dead ends: 218 [2020-10-09 10:44:11,863 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:44:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-09 10:44:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-09 10:44:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:44:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:44:11,866 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:44:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:11,867 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:44:11,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:44:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:11,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:11,867 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:12,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-09 10:44:12,068 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:12,068 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-09 10:44:12,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:12,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597479885] [2020-10-09 10:44:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597479885] [2020-10-09 10:44:12,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100168219] [2020-10-09 10:44:12,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:12,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:12,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:44:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:12,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:12,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:12,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865938380] [2020-10-09 10:44:12,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:12,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:12,648 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:44:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:14,315 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-09 10:44:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:44:14,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:14,317 INFO L225 Difference]: With dead ends: 286 [2020-10-09 10:44:14,323 INFO L226 Difference]: Without dead ends: 281 [2020-10-09 10:44:14,323 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:44:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-09 10:44:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-09 10:44:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:44:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:44:14,326 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:44:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:14,326 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:44:14,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:44:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:14,327 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:14,327 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:14,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:14,528 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-09 10:44:14,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:14,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215802890] [2020-10-09 10:44:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:14,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215802890] [2020-10-09 10:44:14,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17143153] [2020-10-09 10:44:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:14,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:44:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:15,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281060404] [2020-10-09 10:44:15,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:15,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:15,068 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:44:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:16,240 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-09 10:44:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:44:16,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:16,242 INFO L225 Difference]: With dead ends: 268 [2020-10-09 10:44:16,242 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 10:44:16,243 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:44:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 10:44:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-09 10:44:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:44:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:44:16,247 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:44:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:16,247 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:44:16,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:44:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:16,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:16,248 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:16,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-09 10:44:16,456 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-09 10:44:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:16,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041362153] [2020-10-09 10:44:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041362153] [2020-10-09 10:44:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228104658] [2020-10-09 10:44:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:16,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:44:16,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:16,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:44:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:16,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:16,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:16,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264328716] [2020-10-09 10:44:16,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:16,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:16,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:16,996 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:44:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:18,654 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-09 10:44:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:44:18,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:18,656 INFO L225 Difference]: With dead ends: 296 [2020-10-09 10:44:18,656 INFO L226 Difference]: Without dead ends: 291 [2020-10-09 10:44:18,656 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:44:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-09 10:44:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-09 10:44:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:44:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:44:18,660 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:44:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:18,660 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:44:18,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:44:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:18,661 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:18,661 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:18,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:18,862 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-09 10:44:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:18,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022117095] [2020-10-09 10:44:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022117095] [2020-10-09 10:44:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751140248] [2020-10-09 10:44:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:19,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:44:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:19,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:44:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:19,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:19,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:19,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87192550] [2020-10-09 10:44:19,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:19,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:19,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:19,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:19,403 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:44:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:21,078 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-09 10:44:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:44:21,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:21,080 INFO L225 Difference]: With dead ends: 299 [2020-10-09 10:44:21,080 INFO L226 Difference]: Without dead ends: 294 [2020-10-09 10:44:21,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:44:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-09 10:44:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-09 10:44:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:44:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-09 10:44:21,089 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-09 10:44:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:21,089 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-09 10:44:21,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-09 10:44:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:21,090 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:21,090 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:21,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:21,290 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-09 10:44:21,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:21,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325467239] [2020-10-09 10:44:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:21,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325467239] [2020-10-09 10:44:21,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076782031] [2020-10-09 10:44:21,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:21,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:44:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:21,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:21,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:21,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515962032] [2020-10-09 10:44:21,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:21,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:21,940 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-09 10:44:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:23,395 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-09 10:44:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:44:23,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:23,398 INFO L225 Difference]: With dead ends: 274 [2020-10-09 10:44:23,398 INFO L226 Difference]: Without dead ends: 272 [2020-10-09 10:44:23,399 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:44:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-09 10:44:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-09 10:44:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:44:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:44:23,403 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:44:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:23,404 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:44:23,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:44:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:23,404 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:23,404 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:23,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:23,614 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-09 10:44:23,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:23,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891617565] [2020-10-09 10:44:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:23,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891617565] [2020-10-09 10:44:23,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976924629] [2020-10-09 10:44:23,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:23,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:44:23,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875356317] [2020-10-09 10:44:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:24,272 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:44:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:25,851 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-09 10:44:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:44:25,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:25,854 INFO L225 Difference]: With dead ends: 282 [2020-10-09 10:44:25,854 INFO L226 Difference]: Without dead ends: 280 [2020-10-09 10:44:25,854 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:44:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-09 10:44:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-09 10:44:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-09 10:44:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-09 10:44:25,858 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-09 10:44:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:25,859 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-09 10:44:25,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-09 10:44:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:25,859 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:25,859 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:26,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-09 10:44:26,064 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-09 10:44:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:26,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719077127] [2020-10-09 10:44:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:26,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719077127] [2020-10-09 10:44:26,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935239461] [2020-10-09 10:44:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:26,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:44:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:26,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:26,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:26,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025350980] [2020-10-09 10:44:26,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:26,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:44:26,697 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-09 10:44:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:28,830 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-09 10:44:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:44:28,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:28,834 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:44:28,834 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:44:28,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 10:44:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:44:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-09 10:44:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-09 10:44:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-09 10:44:28,838 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-09 10:44:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:28,838 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-09 10:44:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-09 10:44:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:28,839 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:28,839 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:29,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-09 10:44:29,041 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-09 10:44:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:29,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021962748] [2020-10-09 10:44:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:29,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021962748] [2020-10-09 10:44:29,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691201935] [2020-10-09 10:44:29,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:29,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:44:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:33,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:44:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:33,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:33,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:33,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381661861] [2020-10-09 10:44:33,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:33,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:33,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:33,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-09 10:44:33,764 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-09 10:44:38,629 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-09 10:44:42,831 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:44:47,171 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-09 10:44:51,527 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-09 10:44:53,657 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:45:00,376 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-09 10:45:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:01,398 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-09 10:45:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:45:01,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:01,401 INFO L225 Difference]: With dead ends: 323 [2020-10-09 10:45:01,401 INFO L226 Difference]: Without dead ends: 315 [2020-10-09 10:45:01,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-09 10:45:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-09 10:45:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-09 10:45:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:45:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-09 10:45:01,405 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-09 10:45:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:01,405 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-09 10:45:01,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-09 10:45:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:01,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:01,406 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:01,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-09 10:45:01,606 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-09 10:45:01,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:01,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036713480] [2020-10-09 10:45:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036713480] [2020-10-09 10:45:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209486683] [2020-10-09 10:45:01,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:01,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:02,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:02,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:45:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:02,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:02,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692467118] [2020-10-09 10:45:02,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:02,276 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-09 10:45:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:04,778 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-09 10:45:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:45:04,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:04,780 INFO L225 Difference]: With dead ends: 320 [2020-10-09 10:45:04,780 INFO L226 Difference]: Without dead ends: 312 [2020-10-09 10:45:04,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 10:45:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-09 10:45:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-09 10:45:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-09 10:45:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-09 10:45:04,784 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-09 10:45:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:04,784 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-09 10:45:04,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-09 10:45:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:04,784 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:04,784 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:04,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-09 10:45:04,988 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-09 10:45:04,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:04,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039120029] [2020-10-09 10:45:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:05,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039120029] [2020-10-09 10:45:05,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712048870] [2020-10-09 10:45:05,154 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:05,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:05,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:05,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:05,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:05,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607303178] [2020-10-09 10:45:05,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:05,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:05,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:05,561 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-09 10:45:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:06,719 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-09 10:45:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:45:06,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:06,722 INFO L225 Difference]: With dead ends: 256 [2020-10-09 10:45:06,722 INFO L226 Difference]: Without dead ends: 254 [2020-10-09 10:45:06,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:45:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-09 10:45:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-09 10:45:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-09 10:45:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-09 10:45:06,726 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-09 10:45:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:06,726 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-09 10:45:06,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-09 10:45:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:06,726 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:06,726 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:06,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-09 10:45:06,927 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:06,928 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-09 10:45:06,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:06,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719717081] [2020-10-09 10:45:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:07,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719717081] [2020-10-09 10:45:07,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824472101] [2020-10-09 10:45:07,161 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:07,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:07,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:07,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:07,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892970869] [2020-10-09 10:45:07,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:07,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:07,578 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-09 10:45:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:09,148 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-09 10:45:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:45:09,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:09,151 INFO L225 Difference]: With dead ends: 294 [2020-10-09 10:45:09,151 INFO L226 Difference]: Without dead ends: 292 [2020-10-09 10:45:09,152 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:45:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-09 10:45:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-09 10:45:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:45:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-09 10:45:09,155 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-09 10:45:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:09,155 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-09 10:45:09,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-09 10:45:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:09,155 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:09,155 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:09,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:09,356 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-09 10:45:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:09,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705712043] [2020-10-09 10:45:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705712043] [2020-10-09 10:45:09,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648623552] [2020-10-09 10:45:09,533 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:09,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:09,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:09,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:09,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737750659] [2020-10-09 10:45:09,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:09,961 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-09 10:45:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:11,196 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-09 10:45:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:45:11,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:11,199 INFO L225 Difference]: With dead ends: 266 [2020-10-09 10:45:11,199 INFO L226 Difference]: Without dead ends: 264 [2020-10-09 10:45:11,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:45:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-09 10:45:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-09 10:45:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:45:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-09 10:45:11,203 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-09 10:45:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:11,203 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-09 10:45:11,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-09 10:45:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:11,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:11,203 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:11,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:11,404 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-09 10:45:11,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:11,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962212913] [2020-10-09 10:45:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:11,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962212913] [2020-10-09 10:45:11,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210781329] [2020-10-09 10:45:11,590 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:11,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:11,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:11,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:11,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497811212] [2020-10-09 10:45:11,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:11,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:11,933 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-09 10:45:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:13,714 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-09 10:45:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:45:13,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:13,718 INFO L225 Difference]: With dead ends: 275 [2020-10-09 10:45:13,718 INFO L226 Difference]: Without dead ends: 273 [2020-10-09 10:45:13,719 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:45:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-09 10:45:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-09 10:45:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:45:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-09 10:45:13,722 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-09 10:45:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:13,722 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-09 10:45:13,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-09 10:45:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:13,722 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:13,723 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:13,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:13,923 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-09 10:45:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:13,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874500559] [2020-10-09 10:45:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:14,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874500559] [2020-10-09 10:45:14,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903056924] [2020-10-09 10:45:14,165 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:14,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:14,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:14,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:14,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:14,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793942767] [2020-10-09 10:45:14,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:14,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:14,551 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-09 10:45:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:16,395 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-09 10:45:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:45:16,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:16,398 INFO L225 Difference]: With dead ends: 285 [2020-10-09 10:45:16,398 INFO L226 Difference]: Without dead ends: 277 [2020-10-09 10:45:16,398 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 10:45:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-09 10:45:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-09 10:45:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:45:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-09 10:45:16,402 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-09 10:45:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:16,402 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-09 10:45:16,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-09 10:45:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:16,402 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:16,402 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:16,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-09 10:45:16,605 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-09 10:45:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:16,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902461585] [2020-10-09 10:45:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:16,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902461585] [2020-10-09 10:45:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317586069] [2020-10-09 10:45:16,824 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:16,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:17,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:45:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:17,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:17,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764795499] [2020-10-09 10:45:17,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:17,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:17,242 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-09 10:45:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:19,109 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-09 10:45:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:45:19,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:19,112 INFO L225 Difference]: With dead ends: 307 [2020-10-09 10:45:19,112 INFO L226 Difference]: Without dead ends: 299 [2020-10-09 10:45:19,112 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:45:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-09 10:45:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-09 10:45:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:45:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-09 10:45:19,115 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-09 10:45:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-09 10:45:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-09 10:45:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:19,116 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:19,116 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:19,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:19,317 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-09 10:45:19,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:19,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161833972] [2020-10-09 10:45:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:19,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161833972] [2020-10-09 10:45:19,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739105101] [2020-10-09 10:45:19,512 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:19,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:19,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:19,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510379313] [2020-10-09 10:45:19,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:19,842 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-09 10:45:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:21,326 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-09 10:45:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:45:21,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:21,330 INFO L225 Difference]: With dead ends: 280 [2020-10-09 10:45:21,330 INFO L226 Difference]: Without dead ends: 278 [2020-10-09 10:45:21,331 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:45:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-09 10:45:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-09 10:45:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:45:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-09 10:45:21,334 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-09 10:45:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:21,334 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-09 10:45:21,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-09 10:45:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:21,334 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:21,334 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:21,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-09 10:45:21,535 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-09 10:45:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049604212] [2020-10-09 10:45:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049604212] [2020-10-09 10:45:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066042161] [2020-10-09 10:45:21,788 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:21,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:21,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:22,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:22,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272245269] [2020-10-09 10:45:22,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:22,202 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-09 10:45:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:24,170 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-09 10:45:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:45:24,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:24,184 INFO L225 Difference]: With dead ends: 315 [2020-10-09 10:45:24,184 INFO L226 Difference]: Without dead ends: 307 [2020-10-09 10:45:24,184 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:45:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-09 10:45:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-09 10:45:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:45:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-09 10:45:24,187 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-09 10:45:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:24,188 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-09 10:45:24,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-09 10:45:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:24,188 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:24,188 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:24,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:24,389 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-09 10:45:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:24,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962175646] [2020-10-09 10:45:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962175646] [2020-10-09 10:45:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885318400] [2020-10-09 10:45:24,646 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:24,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:25,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:45:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:25,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:25,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:25,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141795580] [2020-10-09 10:45:25,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:25,061 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-09 10:45:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:27,476 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-09 10:45:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:45:27,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:27,480 INFO L225 Difference]: With dead ends: 312 [2020-10-09 10:45:27,480 INFO L226 Difference]: Without dead ends: 304 [2020-10-09 10:45:27,481 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:45:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-09 10:45:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-09 10:45:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-09 10:45:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-09 10:45:27,484 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-09 10:45:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:27,485 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-09 10:45:27,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-09 10:45:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:27,485 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:27,485 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:27,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-09 10:45:27,686 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-09 10:45:27,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:27,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521841740] [2020-10-09 10:45:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:27,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521841740] [2020-10-09 10:45:27,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605452367] [2020-10-09 10:45:27,948 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:28,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:28,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:28,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:28,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628659828] [2020-10-09 10:45:28,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:28,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:28,416 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-09 10:45:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:31,159 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-09 10:45:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:45:31,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:31,163 INFO L225 Difference]: With dead ends: 307 [2020-10-09 10:45:31,163 INFO L226 Difference]: Without dead ends: 299 [2020-10-09 10:45:31,164 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:45:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-09 10:45:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-09 10:45:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-09 10:45:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-09 10:45:31,167 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-09 10:45:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:31,167 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-09 10:45:31,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-09 10:45:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:31,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:31,168 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:31,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:31,368 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-09 10:45:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:31,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74415512] [2020-10-09 10:45:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74415512] [2020-10-09 10:45:31,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577417844] [2020-10-09 10:45:31,669 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:31,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:31,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:32,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:32,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:32,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941339703] [2020-10-09 10:45:32,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:32,150 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-09 10:45:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:32,977 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-09 10:45:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:45:32,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:32,981 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:45:32,981 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:45:32,981 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:45:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:45:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-09 10:45:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-09 10:45:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-09 10:45:32,985 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-09 10:45:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:32,985 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-09 10:45:32,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-09 10:45:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:32,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:32,985 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:33,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-09 10:45:33,186 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:33,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-09 10:45:33,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:33,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407048202] [2020-10-09 10:45:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:33,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407048202] [2020-10-09 10:45:33,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000741269] [2020-10-09 10:45:33,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:33,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:33,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:33,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:33,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821878447] [2020-10-09 10:45:33,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:33,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:33,914 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-09 10:45:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:34,788 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-09 10:45:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:34,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:34,793 INFO L225 Difference]: With dead ends: 223 [2020-10-09 10:45:34,793 INFO L226 Difference]: Without dead ends: 221 [2020-10-09 10:45:34,793 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:45:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-09 10:45:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-09 10:45:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-09 10:45:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-09 10:45:34,796 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-09 10:45:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:34,796 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-09 10:45:34,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-09 10:45:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:34,797 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:34,797 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:35,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-09 10:45:35,001 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-09 10:45:35,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:35,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484045528] [2020-10-09 10:45:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:35,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484045528] [2020-10-09 10:45:35,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295107240] [2020-10-09 10:45:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:35,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:35,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:35,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:35,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722469904] [2020-10-09 10:45:35,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:35,826 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-09 10:45:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:36,845 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-09 10:45:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:45:36,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:36,850 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:45:36,850 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:45:36,850 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:45:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:45:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-09 10:45:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-09 10:45:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-09 10:45:36,854 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-09 10:45:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:36,854 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-09 10:45:36,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-09 10:45:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:36,854 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:36,854 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:37,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:37,055 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:37,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-09 10:45:37,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:37,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899386665] [2020-10-09 10:45:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:37,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899386665] [2020-10-09 10:45:37,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265576952] [2020-10-09 10:45:37,310 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:37,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:37,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:37,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:45:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:39,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:39,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:45:39,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591695882] [2020-10-09 10:45:39,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:45:39,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:45:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-09 10:45:39,922 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-09 10:45:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:59,973 INFO L93 Difference]: Finished difference Result 265 states and 613 transitions. [2020-10-09 10:46:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:46:00,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:46:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:00,000 INFO L225 Difference]: With dead ends: 265 [2020-10-09 10:46:00,000 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:46:00,001 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-09 10:46:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:46:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 150. [2020-10-09 10:46:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-09 10:46:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-09 10:46:00,005 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-09 10:46:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:00,006 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-09 10:46:00,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:46:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-09 10:46:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:00,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:00,006 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:00,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:00,207 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-09 10:46:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:00,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451901282] [2020-10-09 10:46:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:00,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451901282] [2020-10-09 10:46:00,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604269437] [2020-10-09 10:46:00,473 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:00,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:46:00,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:00,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:00,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:00,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:00,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741245254] [2020-10-09 10:46:00,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:00,961 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-09 10:46:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:02,169 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-09 10:46:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:46:02,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:02,174 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:46:02,174 INFO L226 Difference]: Without dead ends: 220 [2020-10-09 10:46:02,174 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:46:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-09 10:46:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-09 10:46:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:46:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-09 10:46:02,177 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-09 10:46:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:02,177 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-09 10:46:02,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-09 10:46:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:02,177 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:02,177 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:02,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:02,378 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:02,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-09 10:46:02,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:02,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816485290] [2020-10-09 10:46:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816485290] [2020-10-09 10:46:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415788055] [2020-10-09 10:46:02,684 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:46:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:03,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-09 10:46:03,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-09 10:46:03,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262207521] [2020-10-09 10:46:03,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:46:03,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:46:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:46:03,041 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-09 10:46:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:03,121 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-09 10:46:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:46:03,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-09 10:46:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:03,125 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:46:03,125 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:46:03,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:46:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:46:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-09 10:46:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-09 10:46:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-09 10:46:03,130 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-09 10:46:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:03,130 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-09 10:46:03,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:46:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-09 10:46:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:03,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:03,130 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:03,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:03,331 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-09 10:46:03,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:03,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679841338] [2020-10-09 10:46:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:03,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679841338] [2020-10-09 10:46:03,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157349185] [2020-10-09 10:46:03,829 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:03,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:03,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:46:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:04,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-09 10:46:04,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-09 10:46:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245379644] [2020-10-09 10:46:04,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:46:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:46:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:46:04,177 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-09 10:46:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:04,252 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-09 10:46:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:46:04,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-09 10:46:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:04,256 INFO L225 Difference]: With dead ends: 338 [2020-10-09 10:46:04,256 INFO L226 Difference]: Without dead ends: 312 [2020-10-09 10:46:04,257 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:46:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-09 10:46:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-09 10:46:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-09 10:46:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-09 10:46:04,262 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-09 10:46:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:04,262 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-09 10:46:04,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:46:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-09 10:46:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:04,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:04,263 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:04,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-09 10:46:04,464 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:04,464 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-09 10:46:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:04,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475306409] [2020-10-09 10:46:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:04,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475306409] [2020-10-09 10:46:04,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607058071] [2020-10-09 10:46:04,841 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:05,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886901862] [2020-10-09 10:46:05,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:05,480 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-09 10:46:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:05,659 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-09 10:46:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:46:05,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:05,664 INFO L225 Difference]: With dead ends: 353 [2020-10-09 10:46:05,664 INFO L226 Difference]: Without dead ends: 351 [2020-10-09 10:46:05,664 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-09 10:46:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-09 10:46:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-09 10:46:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-09 10:46:05,670 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-09 10:46:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:05,670 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-09 10:46:05,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-09 10:46:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:05,670 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:05,671 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:05,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:05,871 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-09 10:46:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382504226] [2020-10-09 10:46:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382504226] [2020-10-09 10:46:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330590926] [2020-10-09 10:46:06,192 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:06,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:06,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:06,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:06,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968885186] [2020-10-09 10:46:06,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:06,641 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-09 10:46:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:07,303 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-09 10:46:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:46:07,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:07,308 INFO L225 Difference]: With dead ends: 377 [2020-10-09 10:46:07,308 INFO L226 Difference]: Without dead ends: 374 [2020-10-09 10:46:07,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:46:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-09 10:46:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-09 10:46:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-09 10:46:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-09 10:46:07,313 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-09 10:46:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:07,313 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-09 10:46:07,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-09 10:46:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:07,314 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:07,314 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:07,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-09 10:46:07,515 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-09 10:46:07,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:07,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240526416] [2020-10-09 10:46:07,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:07,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240526416] [2020-10-09 10:46:07,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773683045] [2020-10-09 10:46:07,809 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:07,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:10,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:10,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918071806] [2020-10-09 10:46:10,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:10,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:10,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:10,390 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-09 10:46:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:11,267 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-09 10:46:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:46:11,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:11,271 INFO L225 Difference]: With dead ends: 408 [2020-10-09 10:46:11,271 INFO L226 Difference]: Without dead ends: 404 [2020-10-09 10:46:11,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:46:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-09 10:46:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-09 10:46:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-09 10:46:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-09 10:46:11,277 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-09 10:46:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:11,277 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-09 10:46:11,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-09 10:46:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:11,278 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:11,278 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:11,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:11,478 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-09 10:46:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:11,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116952648] [2020-10-09 10:46:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:11,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116952648] [2020-10-09 10:46:11,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426947363] [2020-10-09 10:46:11,779 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:11,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:11,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:11,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:16,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:16,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089956979] [2020-10-09 10:46:16,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:16,772 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 19 states. [2020-10-09 10:46:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:17,642 INFO L93 Difference]: Finished difference Result 406 states and 1027 transitions. [2020-10-09 10:46:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:46:17,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:17,644 INFO L225 Difference]: With dead ends: 406 [2020-10-09 10:46:17,645 INFO L226 Difference]: Without dead ends: 403 [2020-10-09 10:46:17,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:46:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-09 10:46:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 329. [2020-10-09 10:46:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-09 10:46:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-09 10:46:17,651 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-09 10:46:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:17,651 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-09 10:46:17,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-09 10:46:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:17,652 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:17,652 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:17,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-09 10:46:17,862 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-09 10:46:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:17,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383801869] [2020-10-09 10:46:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383801869] [2020-10-09 10:46:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036997341] [2020-10-09 10:46:18,174 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:18,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:46:18,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:18,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:18,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:22,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:22,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695838091] [2020-10-09 10:46:22,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:22,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:22,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:46:22,917 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-09 10:46:27,349 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:46:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:28,095 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-09 10:46:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:46:28,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:28,100 INFO L225 Difference]: With dead ends: 437 [2020-10-09 10:46:28,100 INFO L226 Difference]: Without dead ends: 432 [2020-10-09 10:46:28,100 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:46:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-09 10:46:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-09 10:46:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-09 10:46:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-09 10:46:28,105 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-09 10:46:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:28,105 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-09 10:46:28,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-09 10:46:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:28,106 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:28,106 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:28,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:28,306 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-09 10:46:28,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:28,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217407705] [2020-10-09 10:46:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:28,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217407705] [2020-10-09 10:46:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795044996] [2020-10-09 10:46:28,651 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:28,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:46:28,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:29,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:29,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586361995] [2020-10-09 10:46:29,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:29,286 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-09 10:46:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:30,256 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-09 10:46:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:46:30,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:30,260 INFO L225 Difference]: With dead ends: 427 [2020-10-09 10:46:30,260 INFO L226 Difference]: Without dead ends: 423 [2020-10-09 10:46:30,260 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:46:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-09 10:46:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-09 10:46:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-09 10:46:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-09 10:46:30,265 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-09 10:46:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:30,265 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-09 10:46:30,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-09 10:46:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:30,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:30,265 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:30,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:30,466 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-09 10:46:30,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:30,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182870572] [2020-10-09 10:46:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:30,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182870572] [2020-10-09 10:46:30,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353905468] [2020-10-09 10:46:30,783 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:31,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:31,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:31,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438595237] [2020-10-09 10:46:31,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:31,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:31,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:31,431 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-09 10:46:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:32,595 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-09 10:46:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:46:32,598 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:32,599 INFO L225 Difference]: With dead ends: 411 [2020-10-09 10:46:32,599 INFO L226 Difference]: Without dead ends: 408 [2020-10-09 10:46:32,599 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:46:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-09 10:46:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-09 10:46:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-09 10:46:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-09 10:46:32,604 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-09 10:46:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:32,605 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-09 10:46:32,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-09 10:46:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:32,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:32,605 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:32,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-09 10:46:32,806 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-09 10:46:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:32,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382984414] [2020-10-09 10:46:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382984414] [2020-10-09 10:46:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248894440] [2020-10-09 10:46:33,110 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:33,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:33,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:33,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:33,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972194964] [2020-10-09 10:46:33,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:33,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:46:33,687 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-09 10:46:34,488 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-09 10:46:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:34,846 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-09 10:46:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:46:34,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:46:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:34,850 INFO L225 Difference]: With dead ends: 441 [2020-10-09 10:46:34,851 INFO L226 Difference]: Without dead ends: 436 [2020-10-09 10:46:34,851 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:46:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-09 10:46:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-09 10:46:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-09 10:46:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-09 10:46:34,855 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-09 10:46:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:34,855 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-09 10:46:34,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:46:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-09 10:46:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:46:34,856 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:34,856 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:35,057 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-09 10:46:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682670262] [2020-10-09 10:46:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682670262] [2020-10-09 10:46:35,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208705092] [2020-10-09 10:46:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:35,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:46:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:55,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:55,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:46:55,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280949047] [2020-10-09 10:46:55,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:46:55,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:46:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-10-09 10:46:55,194 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-09 10:46:59,619 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:47:05,120 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-09 10:47:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:07,602 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-09 10:47:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:47:07,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:07,608 INFO L225 Difference]: With dead ends: 455 [2020-10-09 10:47:07,608 INFO L226 Difference]: Without dead ends: 450 [2020-10-09 10:47:07,608 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=253, Invalid=499, Unknown=4, NotChecked=0, Total=756 [2020-10-09 10:47:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-09 10:47:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-09 10:47:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-09 10:47:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-09 10:47:07,613 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-09 10:47:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:07,614 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-09 10:47:07,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-09 10:47:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:07,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:07,614 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:07,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:07,815 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-09 10:47:07,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:07,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441614471] [2020-10-09 10:47:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:08,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441614471] [2020-10-09 10:47:08,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200192770] [2020-10-09 10:47:08,149 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:08,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:47:08,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:10,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:10,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:10,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483358611] [2020-10-09 10:47:10,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:10,217 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-09 10:47:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:11,527 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-09 10:47:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:47:11,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:11,532 INFO L225 Difference]: With dead ends: 464 [2020-10-09 10:47:11,532 INFO L226 Difference]: Without dead ends: 458 [2020-10-09 10:47:11,533 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-09 10:47:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-09 10:47:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-09 10:47:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-09 10:47:11,538 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-09 10:47:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:11,538 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-09 10:47:11,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-09 10:47:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:11,538 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:11,538 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:11,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:11,739 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:11,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-09 10:47:11,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:11,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984536819] [2020-10-09 10:47:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984536819] [2020-10-09 10:47:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262237530] [2020-10-09 10:47:12,059 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:12,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:47:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:12,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:12,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:12,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465904373] [2020-10-09 10:47:12,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:12,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:12,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:12,633 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-09 10:47:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:13,726 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-09 10:47:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:47:13,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:13,731 INFO L225 Difference]: With dead ends: 414 [2020-10-09 10:47:13,731 INFO L226 Difference]: Without dead ends: 411 [2020-10-09 10:47:13,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:47:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-09 10:47:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-09 10:47:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-09 10:47:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-09 10:47:13,735 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-09 10:47:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:13,736 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-09 10:47:13,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-09 10:47:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:13,736 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:13,736 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:13,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:13,937 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-09 10:47:13,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:13,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775334696] [2020-10-09 10:47:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775334696] [2020-10-09 10:47:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360002056] [2020-10-09 10:47:14,251 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:14,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:47:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:14,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:14,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111456177] [2020-10-09 10:47:14,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:14,870 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-09 10:47:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:15,946 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-09 10:47:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:47:15,948 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:15,949 INFO L225 Difference]: With dead ends: 441 [2020-10-09 10:47:15,949 INFO L226 Difference]: Without dead ends: 437 [2020-10-09 10:47:15,950 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:47:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-09 10:47:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-09 10:47:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-09 10:47:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-09 10:47:15,954 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-09 10:47:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:15,954 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-09 10:47:15,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-09 10:47:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:15,955 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:15,955 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:16,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-09 10:47:16,156 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:16,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-09 10:47:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:16,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213998013] [2020-10-09 10:47:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:16,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213998013] [2020-10-09 10:47:16,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100417519] [2020-10-09 10:47:16,489 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:17,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:17,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798182489] [2020-10-09 10:47:17,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:17,357 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-09 10:47:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:18,592 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-09 10:47:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:47:18,596 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:18,597 INFO L225 Difference]: With dead ends: 454 [2020-10-09 10:47:18,597 INFO L226 Difference]: Without dead ends: 449 [2020-10-09 10:47:18,598 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:47:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-09 10:47:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-09 10:47:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-09 10:47:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-09 10:47:18,603 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-09 10:47:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:18,603 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-09 10:47:18,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-09 10:47:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:18,604 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:18,604 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:18,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-09 10:47:18,805 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-09 10:47:18,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:18,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237540287] [2020-10-09 10:47:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:19,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237540287] [2020-10-09 10:47:19,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195257053] [2020-10-09 10:47:19,141 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:19,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:47:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:19,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:19,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:19,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547203767] [2020-10-09 10:47:19,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:19,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:19,702 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-09 10:47:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:20,793 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-09 10:47:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:47:20,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:20,798 INFO L225 Difference]: With dead ends: 464 [2020-10-09 10:47:20,798 INFO L226 Difference]: Without dead ends: 459 [2020-10-09 10:47:20,799 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:47:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-09 10:47:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-09 10:47:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-09 10:47:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-09 10:47:20,804 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-09 10:47:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:20,805 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-09 10:47:20,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-09 10:47:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:20,805 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:20,805 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:21,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-09 10:47:21,006 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-09 10:47:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:21,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743918583] [2020-10-09 10:47:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:21,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743918583] [2020-10-09 10:47:21,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153923624] [2020-10-09 10:47:21,322 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:21,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:47:21,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:21,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:21,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:21,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:21,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441229142] [2020-10-09 10:47:21,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:21,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:21,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:21,784 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-09 10:47:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:22,628 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-09 10:47:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:47:22,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:22,631 INFO L225 Difference]: With dead ends: 475 [2020-10-09 10:47:22,631 INFO L226 Difference]: Without dead ends: 469 [2020-10-09 10:47:22,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:47:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-09 10:47:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-09 10:47:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-09 10:47:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-09 10:47:22,636 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-09 10:47:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:22,636 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-09 10:47:22,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-09 10:47:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:22,637 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:22,637 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:22,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:22,839 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-09 10:47:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415203711] [2020-10-09 10:47:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:23,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415203711] [2020-10-09 10:47:23,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204826290] [2020-10-09 10:47:23,178 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:23,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:47:23,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:23,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:23,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628169399] [2020-10-09 10:47:23,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:23,710 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-09 10:47:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:24,838 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-09 10:47:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:47:24,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:24,842 INFO L225 Difference]: With dead ends: 474 [2020-10-09 10:47:24,842 INFO L226 Difference]: Without dead ends: 468 [2020-10-09 10:47:24,842 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:47:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-09 10:47:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-09 10:47:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-09 10:47:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-09 10:47:24,847 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-09 10:47:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:24,848 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-09 10:47:24,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-09 10:47:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:24,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:24,848 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:25,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-09 10:47:25,049 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-09 10:47:25,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:25,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162105749] [2020-10-09 10:47:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162105749] [2020-10-09 10:47:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816154729] [2020-10-09 10:47:25,365 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:25,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:47:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:26,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:26,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292136351] [2020-10-09 10:47:26,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:26,025 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-09 10:47:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:27,561 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-09 10:47:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:47:27,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:27,566 INFO L225 Difference]: With dead ends: 478 [2020-10-09 10:47:27,566 INFO L226 Difference]: Without dead ends: 472 [2020-10-09 10:47:27,566 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:47:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-09 10:47:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-09 10:47:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-09 10:47:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-09 10:47:27,571 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-09 10:47:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:27,572 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-09 10:47:27,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-09 10:47:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:27,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:27,572 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:27,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-09 10:47:27,773 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:27,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-09 10:47:27,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:27,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661443529] [2020-10-09 10:47:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661443529] [2020-10-09 10:47:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619121209] [2020-10-09 10:47:28,056 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:28,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:47:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:36,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:36,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741872182] [2020-10-09 10:47:36,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:47:36,389 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-09 10:47:40,974 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-09 10:47:45,347 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-09 10:47:47,973 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 10:47:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:48,491 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-09 10:47:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:47:48,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:48,494 INFO L225 Difference]: With dead ends: 461 [2020-10-09 10:47:48,495 INFO L226 Difference]: Without dead ends: 456 [2020-10-09 10:47:48,495 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-09 10:47:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-09 10:47:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-09 10:47:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-09 10:47:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-09 10:47:48,500 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-09 10:47:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:48,500 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-09 10:47:48,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-09 10:47:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:48,500 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:48,500 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:48,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:48,701 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-09 10:47:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405293362] [2020-10-09 10:47:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405293362] [2020-10-09 10:47:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456435337] [2020-10-09 10:47:48,973 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:49,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:49,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899503261] [2020-10-09 10:47:49,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:49,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:49,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:49,433 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-09 10:47:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:50,361 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-09 10:47:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:47:50,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:50,366 INFO L225 Difference]: With dead ends: 438 [2020-10-09 10:47:50,366 INFO L226 Difference]: Without dead ends: 417 [2020-10-09 10:47:50,367 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-09 10:47:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-09 10:47:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-09 10:47:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-09 10:47:50,372 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-09 10:47:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:50,372 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-09 10:47:50,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-09 10:47:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:50,373 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:50,373 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:50,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:50,574 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-09 10:47:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:50,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6595029] [2020-10-09 10:47:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:50,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6595029] [2020-10-09 10:47:50,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604817757] [2020-10-09 10:47:50,894 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:50,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:47:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:51,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:51,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:51,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46764937] [2020-10-09 10:47:51,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:51,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:51,344 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-09 10:47:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:52,247 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-09 10:47:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:47:52,250 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:52,252 INFO L225 Difference]: With dead ends: 406 [2020-10-09 10:47:52,252 INFO L226 Difference]: Without dead ends: 403 [2020-10-09 10:47:52,252 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-09 10:47:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-09 10:47:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-09 10:47:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-09 10:47:52,258 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-09 10:47:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:52,258 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-09 10:47:52,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-09 10:47:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:52,258 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:52,258 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:52,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:52,459 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-09 10:47:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:52,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904945600] [2020-10-09 10:47:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904945600] [2020-10-09 10:47:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32405685] [2020-10-09 10:47:52,770 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:47:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:53,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:53,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341117840] [2020-10-09 10:47:53,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:53,282 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-09 10:47:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:54,212 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-09 10:47:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:47:54,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:54,218 INFO L225 Difference]: With dead ends: 436 [2020-10-09 10:47:54,218 INFO L226 Difference]: Without dead ends: 432 [2020-10-09 10:47:54,218 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-09 10:47:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-09 10:47:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-09 10:47:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-09 10:47:54,224 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-09 10:47:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:54,224 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-09 10:47:54,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-09 10:47:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:54,224 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:54,224 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:54,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-09 10:47:54,425 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-09 10:47:54,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:54,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602252954] [2020-10-09 10:47:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602252954] [2020-10-09 10:47:54,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368808046] [2020-10-09 10:47:54,767 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:54,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:47:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:54,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:55,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:55,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045043686] [2020-10-09 10:47:55,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:55,479 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-09 10:47:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:56,504 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-09 10:47:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:47:56,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:56,509 INFO L225 Difference]: With dead ends: 452 [2020-10-09 10:47:56,509 INFO L226 Difference]: Without dead ends: 447 [2020-10-09 10:47:56,510 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:47:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-09 10:47:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-09 10:47:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-09 10:47:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-09 10:47:56,515 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-09 10:47:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:56,516 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-09 10:47:56,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-09 10:47:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:56,516 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:56,516 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:56,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:56,717 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:56,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-09 10:47:56,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:56,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666946263] [2020-10-09 10:47:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:57,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666946263] [2020-10-09 10:47:57,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786282769] [2020-10-09 10:47:57,041 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:57,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:47:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:47:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:57,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:47:57,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:47:57,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935248472] [2020-10-09 10:47:57,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:47:57,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:47:57,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:47:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:47:57,639 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-09 10:47:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:47:58,942 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-09 10:47:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:47:58,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:47:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:47:58,947 INFO L225 Difference]: With dead ends: 451 [2020-10-09 10:47:58,947 INFO L226 Difference]: Without dead ends: 446 [2020-10-09 10:47:58,947 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:47:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-09 10:47:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-09 10:47:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-09 10:47:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-09 10:47:58,953 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-09 10:47:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:47:58,953 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-09 10:47:58,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:47:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-09 10:47:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:47:58,954 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:47:58,954 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:47:59,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-09 10:47:59,155 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:47:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:47:59,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-09 10:47:59,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:47:59,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969986408] [2020-10-09 10:47:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:47:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:47:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:47:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969986408] [2020-10-09 10:47:59,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338508711] [2020-10-09 10:47:59,479 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:47:59,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:47:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:47:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:47:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:06,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:06,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692388999] [2020-10-09 10:48:06,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:06,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-09 10:48:06,371 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-09 10:48:11,069 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-09 10:48:15,298 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-09 10:48:17,847 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-09 10:48:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:18,563 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-09 10:48:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:18,567 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:18,568 INFO L225 Difference]: With dead ends: 481 [2020-10-09 10:48:18,568 INFO L226 Difference]: Without dead ends: 475 [2020-10-09 10:48:18,569 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-09 10:48:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-09 10:48:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-09 10:48:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-09 10:48:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-09 10:48:18,574 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-09 10:48:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:18,574 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-09 10:48:18,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-09 10:48:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:18,575 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:18,575 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:18,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-09 10:48:18,775 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-09 10:48:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:18,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64061554] [2020-10-09 10:48:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64061554] [2020-10-09 10:48:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644926241] [2020-10-09 10:48:19,131 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:19,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:19,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099240947] [2020-10-09 10:48:19,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:19,866 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-09 10:48:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:21,531 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-09 10:48:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:48:21,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:21,536 INFO L225 Difference]: With dead ends: 482 [2020-10-09 10:48:21,536 INFO L226 Difference]: Without dead ends: 476 [2020-10-09 10:48:21,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:48:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-09 10:48:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-09 10:48:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-09 10:48:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-09 10:48:21,541 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-09 10:48:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:21,541 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-09 10:48:21,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-09 10:48:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:21,542 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:21,542 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:21,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-09 10:48:21,743 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:21,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-09 10:48:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:21,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563178022] [2020-10-09 10:48:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:22,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563178022] [2020-10-09 10:48:22,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130997309] [2020-10-09 10:48:22,136 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:22,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:22,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:22,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:22,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720550477] [2020-10-09 10:48:22,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:22,654 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-09 10:48:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:23,689 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-09 10:48:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:23,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:23,694 INFO L225 Difference]: With dead ends: 460 [2020-10-09 10:48:23,694 INFO L226 Difference]: Without dead ends: 455 [2020-10-09 10:48:23,694 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:48:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-09 10:48:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-09 10:48:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-09 10:48:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-09 10:48:23,699 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-09 10:48:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:23,699 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-09 10:48:23,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-09 10:48:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:23,700 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:23,700 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:23,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-09 10:48:23,901 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-09 10:48:23,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:23,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006930997] [2020-10-09 10:48:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006930997] [2020-10-09 10:48:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647839793] [2020-10-09 10:48:24,268 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:24,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:48:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859776509] [2020-10-09 10:48:24,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:24,750 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-09 10:48:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:25,646 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-09 10:48:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:25,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:25,649 INFO L225 Difference]: With dead ends: 481 [2020-10-09 10:48:25,649 INFO L226 Difference]: Without dead ends: 475 [2020-10-09 10:48:25,650 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-09 10:48:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-09 10:48:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-09 10:48:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-09 10:48:25,655 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-09 10:48:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:25,655 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-09 10:48:25,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-09 10:48:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:25,655 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:25,655 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:25,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-09 10:48:25,856 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-09 10:48:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:25,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137732342] [2020-10-09 10:48:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137732342] [2020-10-09 10:48:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926202298] [2020-10-09 10:48:26,244 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:26,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:26,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:26,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:26,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:26,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610938069] [2020-10-09 10:48:26,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:26,822 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-09 10:48:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:27,892 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-09 10:48:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:27,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:27,898 INFO L225 Difference]: With dead ends: 442 [2020-10-09 10:48:27,898 INFO L226 Difference]: Without dead ends: 423 [2020-10-09 10:48:27,899 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:48:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-09 10:48:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-09 10:48:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-09 10:48:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-09 10:48:27,910 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-09 10:48:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:27,911 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-09 10:48:27,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-09 10:48:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:27,911 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:27,911 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:28,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-09 10:48:28,112 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-09 10:48:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:28,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612182578] [2020-10-09 10:48:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:28,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612182578] [2020-10-09 10:48:28,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811360085] [2020-10-09 10:48:28,502 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:28,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:48:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:29,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:29,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169094570] [2020-10-09 10:48:29,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:29,245 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-09 10:48:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:30,507 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-09 10:48:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:48:30,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:30,513 INFO L225 Difference]: With dead ends: 456 [2020-10-09 10:48:30,513 INFO L226 Difference]: Without dead ends: 450 [2020-10-09 10:48:30,513 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:48:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-09 10:48:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-09 10:48:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-09 10:48:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-09 10:48:30,518 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-09 10:48:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:30,518 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-09 10:48:30,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-09 10:48:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:30,519 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:30,519 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:30,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-09 10:48:30,720 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-09 10:48:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:30,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275860773] [2020-10-09 10:48:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275860773] [2020-10-09 10:48:31,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074784562] [2020-10-09 10:48:31,107 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:31,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:48:31,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:34,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:34,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:34,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913979053] [2020-10-09 10:48:34,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:34,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:34,118 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-09 10:48:34,408 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:48:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:35,640 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-09 10:48:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:48:35,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:35,645 INFO L225 Difference]: With dead ends: 466 [2020-10-09 10:48:35,645 INFO L226 Difference]: Without dead ends: 446 [2020-10-09 10:48:35,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:48:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-09 10:48:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-09 10:48:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-09 10:48:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-09 10:48:35,651 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-09 10:48:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:35,651 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-09 10:48:35,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-09 10:48:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:35,651 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:35,651 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:35,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:35,852 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-09 10:48:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871054608] [2020-10-09 10:48:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871054608] [2020-10-09 10:48:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32890890] [2020-10-09 10:48:36,282 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:36,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:36,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637158296] [2020-10-09 10:48:36,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:36,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:36,937 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-09 10:48:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:37,622 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-09 10:48:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:48:37,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:37,626 INFO L225 Difference]: With dead ends: 437 [2020-10-09 10:48:37,626 INFO L226 Difference]: Without dead ends: 422 [2020-10-09 10:48:37,627 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-09 10:48:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-09 10:48:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-09 10:48:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-09 10:48:37,633 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-09 10:48:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:37,633 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-09 10:48:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-09 10:48:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:37,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:37,634 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:37,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-09 10:48:37,848 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-09 10:48:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:37,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783424171] [2020-10-09 10:48:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:38,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783424171] [2020-10-09 10:48:38,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590214921] [2020-10-09 10:48:38,229 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:38,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:38,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:38,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:38,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:38,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935489416] [2020-10-09 10:48:38,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:38,910 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-09 10:48:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:39,718 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-09 10:48:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:48:39,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:39,723 INFO L225 Difference]: With dead ends: 433 [2020-10-09 10:48:39,723 INFO L226 Difference]: Without dead ends: 417 [2020-10-09 10:48:39,724 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-09 10:48:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-09 10:48:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-09 10:48:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-09 10:48:39,728 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-09 10:48:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:39,729 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-09 10:48:39,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-09 10:48:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:39,729 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:39,729 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:39,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:39,930 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-09 10:48:39,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:39,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509941812] [2020-10-09 10:48:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:40,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509941812] [2020-10-09 10:48:40,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776103642] [2020-10-09 10:48:40,393 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:40,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:48:40,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:40,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:40,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:41,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:41,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:41,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252963104] [2020-10-09 10:48:41,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:41,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:41,019 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-09 10:48:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:41,266 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-09 10:48:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:48:41,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:41,271 INFO L225 Difference]: With dead ends: 394 [2020-10-09 10:48:41,272 INFO L226 Difference]: Without dead ends: 392 [2020-10-09 10:48:41,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:48:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-09 10:48:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-09 10:48:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-09 10:48:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-09 10:48:41,278 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-09 10:48:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:41,278 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-09 10:48:41,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-09 10:48:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:41,278 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:41,278 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:41,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:41,479 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-09 10:48:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:41,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654455391] [2020-10-09 10:48:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:41,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654455391] [2020-10-09 10:48:41,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467700631] [2020-10-09 10:48:41,955 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:41,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:42,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:42,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792100323] [2020-10-09 10:48:42,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:42,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:42,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:42,506 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-09 10:48:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:43,316 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-09 10:48:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:43,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:43,321 INFO L225 Difference]: With dead ends: 420 [2020-10-09 10:48:43,321 INFO L226 Difference]: Without dead ends: 417 [2020-10-09 10:48:43,322 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-09 10:48:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-09 10:48:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-09 10:48:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-09 10:48:43,327 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-09 10:48:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:43,327 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-09 10:48:43,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-09 10:48:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:43,328 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:43,328 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:43,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:43,531 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-09 10:48:43,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:43,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33690717] [2020-10-09 10:48:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33690717] [2020-10-09 10:48:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795846287] [2020-10-09 10:48:44,003 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:44,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:48:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:45,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:45,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356342595] [2020-10-09 10:48:45,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:45,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:45,686 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-09 10:48:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:46,666 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-09 10:48:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:46,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:46,670 INFO L225 Difference]: With dead ends: 452 [2020-10-09 10:48:46,670 INFO L226 Difference]: Without dead ends: 448 [2020-10-09 10:48:46,670 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:48:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-09 10:48:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-09 10:48:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-09 10:48:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-09 10:48:46,682 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-09 10:48:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:46,682 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-09 10:48:46,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-09 10:48:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:46,683 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:46,683 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:46,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-09 10:48:46,884 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-09 10:48:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:46,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022039651] [2020-10-09 10:48:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:47,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022039651] [2020-10-09 10:48:47,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50007998] [2020-10-09 10:48:47,290 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:47,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:48:47,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:51,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182101924] [2020-10-09 10:48:51,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:48:51,441 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-09 10:48:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:52,756 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-09 10:48:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:52,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:48:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:52,760 INFO L225 Difference]: With dead ends: 446 [2020-10-09 10:48:52,760 INFO L226 Difference]: Without dead ends: 443 [2020-10-09 10:48:52,760 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-09 10:48:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-09 10:48:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-09 10:48:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-09 10:48:52,765 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-09 10:48:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:52,765 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-09 10:48:52,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:48:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-09 10:48:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:48:52,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:52,766 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:52,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-09 10:48:52,967 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-09 10:48:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004914237] [2020-10-09 10:48:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:53,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004914237] [2020-10-09 10:48:53,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105829311] [2020-10-09 10:48:53,385 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:48:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:58,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:58,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:48:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098208632] [2020-10-09 10:48:58,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:48:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:48:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-09 10:48:58,159 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-09 10:49:02,624 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-09 10:49:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:03,582 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-09 10:49:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:49:03,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:03,588 INFO L225 Difference]: With dead ends: 483 [2020-10-09 10:49:03,588 INFO L226 Difference]: Without dead ends: 478 [2020-10-09 10:49:03,588 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-09 10:49:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-09 10:49:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-09 10:49:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-09 10:49:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-09 10:49:03,598 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-09 10:49:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:03,598 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-09 10:49:03,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-09 10:49:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:03,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:03,599 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-09 10:49:03,800 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-09 10:49:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:03,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198226660] [2020-10-09 10:49:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198226660] [2020-10-09 10:49:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674156689] [2020-10-09 10:49:04,240 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:04,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:49:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:04,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:04,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:04,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256606591] [2020-10-09 10:49:04,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:04,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:04,964 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-09 10:49:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:06,353 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-09 10:49:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:49:06,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:06,358 INFO L225 Difference]: With dead ends: 469 [2020-10-09 10:49:06,359 INFO L226 Difference]: Without dead ends: 465 [2020-10-09 10:49:06,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:49:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-09 10:49:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-09 10:49:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-09 10:49:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-09 10:49:06,370 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-09 10:49:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:06,370 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-09 10:49:06,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-09 10:49:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:06,371 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:06,371 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:06,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-09 10:49:06,572 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-09 10:49:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029925462] [2020-10-09 10:49:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:06,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029925462] [2020-10-09 10:49:06,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996865114] [2020-10-09 10:49:06,921 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:06,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:49:06,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:13,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:13,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:13,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441589027] [2020-10-09 10:49:13,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:13,680 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-09 10:49:14,822 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-09 10:49:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:15,414 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-09 10:49:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:49:15,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:15,417 INFO L225 Difference]: With dead ends: 440 [2020-10-09 10:49:15,417 INFO L226 Difference]: Without dead ends: 437 [2020-10-09 10:49:15,418 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:49:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-09 10:49:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-09 10:49:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-09 10:49:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-09 10:49:15,422 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-09 10:49:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:15,423 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-09 10:49:15,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-09 10:49:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:15,423 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:15,423 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:15,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:15,626 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-09 10:49:15,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:15,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896581509] [2020-10-09 10:49:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:16,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896581509] [2020-10-09 10:49:16,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116050341] [2020-10-09 10:49:16,014 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:16,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:49:16,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:16,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:16,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891723779] [2020-10-09 10:49:16,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:16,769 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-09 10:49:17,850 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-09 10:49:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:18,460 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-09 10:49:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:49:18,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:18,466 INFO L225 Difference]: With dead ends: 478 [2020-10-09 10:49:18,466 INFO L226 Difference]: Without dead ends: 473 [2020-10-09 10:49:18,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:49:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-09 10:49:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-09 10:49:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-09 10:49:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-09 10:49:18,473 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-09 10:49:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:18,473 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-09 10:49:18,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-09 10:49:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:18,474 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:18,474 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:18,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-09 10:49:18,687 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-09 10:49:18,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:18,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280381522] [2020-10-09 10:49:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280381522] [2020-10-09 10:49:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083251272] [2020-10-09 10:49:19,026 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:19,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:49:19,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:19,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:26,426 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-09 10:49:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:30,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:30,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:30,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99540170] [2020-10-09 10:49:30,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:30,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:30,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=250, Unknown=3, NotChecked=0, Total=342 [2020-10-09 10:49:30,601 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-09 10:49:35,127 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:49:41,522 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-09 10:49:47,728 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-09 10:49:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:50,026 INFO L93 Difference]: Finished difference Result 497 states and 1236 transitions. [2020-10-09 10:49:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:49:50,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:50,031 INFO L225 Difference]: With dead ends: 497 [2020-10-09 10:49:50,031 INFO L226 Difference]: Without dead ends: 492 [2020-10-09 10:49:50,031 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=278, Invalid=589, Unknown=3, NotChecked=0, Total=870 [2020-10-09 10:49:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-09 10:49:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 355. [2020-10-09 10:49:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-09 10:49:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-09 10:49:50,036 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-09 10:49:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:50,037 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-09 10:49:50,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-09 10:49:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:50,037 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:50,037 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:50,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-09 10:49:50,238 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash 469119152, now seen corresponding path program 282 times [2020-10-09 10:49:50,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:50,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658950621] [2020-10-09 10:49:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658950621] [2020-10-09 10:49:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277815140] [2020-10-09 10:49:50,658 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:50,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:49:50,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:50,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:53,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:53,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212899601] [2020-10-09 10:49:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:53,022 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-09 10:49:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:55,007 INFO L93 Difference]: Finished difference Result 505 states and 1258 transitions. [2020-10-09 10:49:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:49:55,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:55,013 INFO L225 Difference]: With dead ends: 505 [2020-10-09 10:49:55,013 INFO L226 Difference]: Without dead ends: 499 [2020-10-09 10:49:55,013 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:49:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-09 10:49:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 349. [2020-10-09 10:49:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-09 10:49:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-09 10:49:55,018 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-09 10:49:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:55,019 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-09 10:49:55,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-09 10:49:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:55,019 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:55,019 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:55,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:55,220 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1327069200, now seen corresponding path program 283 times [2020-10-09 10:49:55,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:55,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262188408] [2020-10-09 10:49:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:55,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262188408] [2020-10-09 10:49:55,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39236615] [2020-10-09 10:49:55,593 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 10:49:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:56,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:56,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-09 10:49:56,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136495832] [2020-10-09 10:49:56,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 10:49:56,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 10:49:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:49:56,261 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-09 10:49:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:57,970 INFO L93 Difference]: Finished difference Result 431 states and 1079 transitions. [2020-10-09 10:49:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:49:57,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-09 10:49:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:57,976 INFO L225 Difference]: With dead ends: 431 [2020-10-09 10:49:57,976 INFO L226 Difference]: Without dead ends: 428 [2020-10-09 10:49:57,976 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:49:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-09 10:49:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 353. [2020-10-09 10:49:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-09 10:49:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-09 10:49:57,982 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-09 10:49:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:57,982 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-09 10:49:57,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 10:49:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-09 10:49:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 10:49:57,982 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:57,982 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:58,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2020-10-09 10:49:58,183 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:58,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1327070161, now seen corresponding path program 284 times [2020-10-09 10:49:58,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:58,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183228891] [2020-10-09 10:49:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-09 10:49:58,440 WARN L210 SmtUtils]: Removed 2 from assertion stack [2020-10-09 10:49:58,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2020-10-09 10:49:58,441 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 10:49:58,445 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 10:49:58,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 10:49:58 BasicIcfg [2020-10-09 10:49:58,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 10:49:58,447 INFO L168 Benchmark]: Toolchain (without parser) took 875359.03 ms. Allocated memory was 252.7 MB in the beginning and 234.9 MB in the end (delta: -17.8 MB). Free memory was 207.2 MB in the beginning and 181.7 MB in the end (delta: 25.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:58,448 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:49:58,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.22 ms. Allocated memory was 252.7 MB in the beginning and 321.9 MB in the end (delta: 69.2 MB). Free memory was 207.2 MB in the beginning and 277.3 MB in the end (delta: -70.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:58,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.37 ms. Allocated memory is still 321.9 MB. Free memory is still 277.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:49:58,448 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 321.9 MB. Free memory was 277.3 MB in the beginning and 274.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:58,449 INFO L168 Benchmark]: RCFGBuilder took 520.33 ms. Allocated memory is still 321.9 MB. Free memory was 274.7 MB in the beginning and 252.6 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:58,449 INFO L168 Benchmark]: TraceAbstraction took 874026.86 ms. Allocated memory was 321.9 MB in the beginning and 234.9 MB in the end (delta: -87.0 MB). Free memory was 252.6 MB in the beginning and 181.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 25.1 MB. Max. memory is 14.2 GB. [2020-10-09 10:49:58,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 730.22 ms. Allocated memory was 252.7 MB in the beginning and 321.9 MB in the end (delta: 69.2 MB). Free memory was 207.2 MB in the beginning and 277.3 MB in the end (delta: -70.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.37 ms. Allocated memory is still 321.9 MB. Free memory is still 277.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 321.9 MB. Free memory was 277.3 MB in the beginning and 274.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 520.33 ms. Allocated memory is still 321.9 MB. Free memory was 274.7 MB in the beginning and 252.6 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 874026.86 ms. Allocated memory was 321.9 MB in the beginning and 234.9 MB in the end (delta: -87.0 MB). Free memory was 252.6 MB in the beginning and 181.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 25.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 21ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 873.9s, OverallIterations: 320, TraceHistogramMax: 7, AutomataDifference: 546.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 4209 SDtfs, 37426 SDslu, 32984 SDs, 0 SdLazy, 23558 SolverSat, 10043 SolverUnsat, 61 SolverUnknown, 0 SolverNotchecked, 153.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9436 GetRequests, 1549 SyntacticMatches, 296 SemanticMatches, 7591 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52153 ImplicationChecksByTransitivity, 603.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 319 MinimizatonAttempts, 21081 StatesRemovedByMinimization, 317 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 244.5s InterpolantComputationTime, 8368 NumberOfCodeBlocks, 8366 NumberOfCodeBlocksAsserted, 1012 NumberOfCheckSat, 7738 ConstructedInterpolants, 53 QuantifiedInterpolants, 900746 SizeOfPredicates, 309 NumberOfNonLiveVariables, 28174 ConjunctsInSsa, 3242 ConjunctsInUnsatCore, 630 InterpolantComputations, 10 PerfectInterpolantSequences, 42/4006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown